1. Bernström , P. 1949 Cytogenetic studies in the genus Lamium
2. Does the fertility of intraspecific hybrids in autogamous species improve in consequence of a heterotic effect?;Bernström;Hereditas,1950a
3. Cleisto- and chasmogamic seed setting in di- and tetraploid Lamium amplexicaule;Bernström;Hereditas,1950b
4. Cytogenetic intraspecific studies in Lamium. I;Bernström;Hereditas,1952
5. Increased crossability in Lamium after chromosome doubling;Bernström;Hereditas,1953a