Krupko S. Megasprogenesis and development of the embryo sac in the Palestine variety of Trifolium alexandrium L. b.m. : 1973.
2
Krupko S. Embryological and karyoligical observations on two selected englisch varieties of white clover, "S 184" and "kersey", sown in the Poznań province. Poznań : 1972.
3
Krupko S. Some embryological and cytological characteristics of two varieties of Oxalis cernua Thunb. Var. Sericea and Var. compressa from South Africa Poznań : 1972.
4
Krupko Stefan O pływkach u Phytophtora nicotianae Breda de Haan Warszawa : 1934.
5
Krupko Stefan Macrosporogenesis and embryo sac development in Chondropetalum Hookerianum (Mast.) Pillans (Restionaceae) Warszawa : 1963.
