1. Tetraploid apple seedlings obtained from the progeny of triploid varieties.;Bergström;Hereditas,1938
2. A preliminary account of the chromosomes and chromosome behaviour in the Salicaceae.;Blackburn;Annals of Botany,1924
3. Etl fynd av jätleasp (Populus tremula gigas) i Medeipad;Blomquist;Botaniska Notiser,1937
4. The chromosomes of a giant Populus tremula.;Müntzing;Hereditas,1936
5. Über eine in der Natur gefundene Gigasform von Populus tremula.;Nilsson-Ehle;Hereditas,1936