1. A cytological investigation of some species and species hybrids within the genus Saccharum;Bremer;Genetica,1923
2. Studies on the collective species Viola tricolor L., I (Preliminary notes) and II;Clausen;Botanisk Tidsskrift,192122
3. The cytology of Primula Kewensis and of other related Primula Hybrids;Digry;Annals of Botany,1912
4. Das Verlumllen der Chromosomen bei der Spermatogenese der Schmetlerlinge Pggaera anachoreta, curtiila und pigro sowie einige ihrer Bastarde;Federley;Zeitschrift für ind. Abstamm. und Verb.-lehre,1913
5. On the genetics of tetraploid plants in Primula sinensis;Gregory;Proc. Boy. Soc. London. B.,1914