Balme, B.E., 1970. Palynology of Permian and Triassic strata in the Salt Range and Surghar Range, West- Pakistan. Dept. Geol. Univ. Kansas. Spec. Publ. 4, pp. 305-453.
Balme, B. E. and Hennelly, J.P. F., 1965. Bisaccate sporomorphs from Australian sediments. Aust. J. Bot. 4(3): 240-260.
Bhardawaj, D. C. and Salujha, S. K., 1964. Sporological study of Seam Ill Raniganj, Coalfield. Bihar (India). Palaeobotanist 13(1): 30-41.
Bose, M. N. and Kar, R. K., 1966. Palaeozoic sporae- dispersae from Congo I. Kindu- Kalima and Walikal region. Ann. Mus. R. Afr. cent. Ser. 8, 53: 1-168.
Bouche, P. M., 1965. Chitinozoares du Silurien S. 1. du DJado (Sahara nigerien). Rev. Micropal, 8: 151-164.
Cramer, F. H., 1969. Distribution of selected Silurian acritarchs. Revista Espanola de Micropaleontoligia, 203 p.
Cramer, F. and Diez, M. C. R., 1972. North American Silurian palynofacies and their spatial arrangment. Acritarch: palaeontographica, B. 138: 107- 180.
Cramer, F. H., Kanes W. H., Diez, M. C. R and Christopher, R. A., 1974. Early Ordovician acritarchs from Tadla Basin of Morocco. Palaeontographica Abt. B., 146: 57-153.
Cramer, F. H. and Diez, M. C. R., 1977. Late Arenigian (Ordovician) acritarchs from Cis- Saharan Morocco. Micropaleont. 23 (3): 339-360.
Clarke, R. F. A., 1965. British permian saccate and monosulcate miospore. Palaeontology, 8 (2): 322-354.
Deunff, P. J., 1961. Un microplancton a hystricospheres dans le Tremadoc du Sahara. Revue de Micropaleontology, 4 (1): 37-52.
Eisenack, A., 1931. Neue Mikrofossilien der baltischen silurs 1. Palaontol. Z. 13: 47- 118.
Eisenack, A. 1958. Neotypen baltischen Silur- Chitinozoen und neues Jabrb. Geol. Palaontol. Abh. 108: 1-20.
Eisenack, A., Cramer, H. and Diez M. C. R. 1976. Katalog der Fossilen dinoflagellaten, Hystrichospharen und verwandten, microfossilien Band III. Acritarch. Schweizerbart, Stuttgart, 1104 pp.
Ghavidel- Syooki, M., 1988. palynostratigraphy and palaeoecology of Faraghan formation of Southeastern Iran. ph. D dissertation, Michigan State University, 275 pp.
Gorka, H., 1987. Acritarch et prasinophyceae de I Ordovician Moyen (Viruen) du Sondage de Smedsby Gard No. 1 (Gotland Suede). Rev. palaeobot. palynol., 52 (4): 257-297.
Gilby, A. R., and Foster, C. B., 1988. Early permian palynology of the Archaringa Basin, South Australia: Palaeontographica, Abt. B., 209:109-191.
Hart, G. F. 1964. A review classification and distribution of permian miospore (disaccate striatiti). C. R. 5th. Congr. Int. Strat. Geol. Carb. Davis: 1171- 1199.
Jacobson, S. R. and Achab, A., 1985. Acritarch biostratigraphy of the Dicellograptus complanatus graptolite zone from the Vaureal formation (Ashgillian), Anticosti Island, Quebec, Canada. Palynology, 9: 165- 198.
Jenkins, W. A. M., 1970. Chitinozoa from Ordovician of the Arbuckle Mountains, Oklahoma. Palaeontology 13 (2): 261-288.
Jenkins, W. A. M., 1967. Ordovician chitinozoa from Shropshire. Palaeontology, 10 (3): 436-488.
Keegan, J. B., Rasul, S. M. and Shaheen, Y, 1990. Palynostratigraphy of the lower palaeozoic (Cambrian to Ordovician) of the Hashemit Kingdom of Jordan. Rev. Palaeobot. Palynol., 66(3/4): 167-180.
Loeblich Jr. A. R. and Tappan. H., 1976. Some new and revised organic- Walled phytoplankton microfossil genera. J. palaeontology 50: 301-308.
Leoblich Jr., A. R. and Tappan, H., 1978. Some middle and late Ordovician microphytoplankton from central North America. J. Paleontology, 52 (6): 1233-1287.
McClure, H. A., 1988. Chitinozoan and acritarch assemblages, stratigraphy and biostratigraphy of the early palaeozoic of northwest Arabia. Rev. palaeobot. palynol., 56 (1/2): 41-60
Molyneux, S. G. and Paris, F., 1985. Late Ordovician palynomorphs from north-east Libya. J. Micropalaeontology, 4 (1): 11-25.
Melchin, M. & Legault, J. A., 1985. Evolutionary lineages in some Ordovician chitinozoa. Palynology, 9: 100-210.
Otton, E. G., Toro, B. A. & Waisfield, B. A., 1992. Lower Ordovician palynomorphs from the Acoite formation, northwestern Argentina. Palynology, 6: 93-116.
Paris, F., 1990. The Ordovician Chitinozoan biozones of the northern Gondwana domain. Rev. Palaeobot. palynol., 66(3/4): 181-209.
Schallreuter, R., 1963. Neue Chitinoen aus Ordovizichen Geschieben und Bemerkungen zur Gotting Illichitina. Palaontol. Abh. 1/4: 392-405.
Szabo, F., Kheradpir, A. and Khalilli, M., 1977. Permo- Triassic study of North Fars and adjacent areas. Company Report. No. 1249.
Taugourdeau, ph., 1961. Chitinozoares du Silurien d' Aquitaine. Rev. de micropaleontologie, 4 (3): 135- 154.
Tschudy, R. H. and Kosanke, R. M., 1966. Early Permian Vesiculate pollen from Texas, U. S. A. palaeobotanist 15(1/2): 59-71.
Turner, R. E., 1984. Acritarchs from the type area of the Ordovician Caradoc Series Shropshire, England. Palaeontographica, Abt. B., 190: 87-168.
Turner, R. E., 1985. Acritarchs from the type area of the Ordovician Llandeilo Series, south Wales. Palynology, 9: 211-234.
Vavrdova, M., 1988. Further acritarchs and terrestrial plant remains from the late Ordovician at Hlasha Treban (Czechoslovakia). Casopos promineralogii a a geologii. rocnic 33 (1): 1-19.
Vavrdova, M., 1990. Early Ordovician acritarchs from the locality Myto near Rokycany (late Arenig, Czechoslovakia). Casopos promineralogiia geologii, roc. 35, C. 3: 239-259.
Vavrdova, M., 1989. New acritarchs and miospores from the Late Ordovician Casopos Promineralogiia geologii, roc. 35, C. 4: 403- 420.
Wilson, L. R., 1962. Permian plant microfossils from the Flowerpot formation, Greer County Oklahoma. Okla. Geol. Surv. Circ. 49: 1-50.
