1. Apomixis in der Gattung Arnica;Afzelius;Svensk Bot. Tidskr.,1936
2. Apomictic and sexual seed formation in Poa pratensis;Hereditas,1939
3. Cytogenetic studies in Poa pratensis and its hybrid with Poa alpina;Hereditas,1942
4. Further studies of the embryo- and endosperm-development in Poa pratensis;Hereditas,1943
5. A cytological study of the genus Poa L;Armstrong;Canadian Jour. Res. C.,1937