1. Cytoembryology of experimental hybrids between two related species of Ornihogalum L;Czapik;Acta Biol. Cracov. Ser. Bot.,1972
2. Studio di embriologico di Ornithogalum umbellatum L;Deźole;Atti. Soc. Tosc. Sc. Nat. Mem.,1947
3. Plant micro-technique. Some principles and new methods;Feder;Am. J. Bot.,1968
4. A contribution to the cytology of fertilization in flowering plants;Gerassimova-Navashina;Nucleus,1960
5. A new clearing-squash technique for the study of ovule development in angiosperms;Herr;Am. J. Bot.,1971