1. Devonian megaspores from east Greenland: Their bearing on the development of certain trends;Allen;Rev. Palaeobot. Palynol.,1972
2. Megaspores with multifurcate and bifurcate processes from Old Red Sandstone facies of Tournaisian age, from the Taff Gorge, south Glamorgan;Allen;New Phytol.,1981
3. An apparently heterosporous plant from the Middle Devonian of New Brunswick;Andrews;Palaeontology,1974
4. Arkhangelskaya, A.D., 1985. Zonal spore assemblages and stratigraphy of the Lower and Middle Devonian of the Russian Plate (in Russian). In: Menner, V.V., Byvsheva, T.V. (Eds.), Atlas of Spores and Pollen from the Phanerozoic Oil Bearing Formations in the Russia and Turan Plates. Nedra, Moscow, pp. 5–25.
5. Middle and Upper Devonian miospore zonation of Eastern Europe;Avkhimovitch;Bull. Centr. Rech. Explor.–Prod. Elf Aquitaine,1993