1. Polyploide Mitosen bei Cannabis sativa L.;Breslawetz;Ber. d. deutsch, botan. Ges.,1926
2. Polyploide Mitosen bei Cannabis sativa L. II.;Breslawetz;Planta,1932
3. A study of synapsis and reduction.;Cardiff;Bull. Torr. Bot. Club,1906
4. Cyto-genetic and taxonomic investigations on Melanium violets.;Clausen;Hereditas,1931
5. Sex in dioecious plants.;Darling;Bull. Torr. Bot. Club,1909