Per Ruuth

Resistance in crop species of the genus Brassica to oviposition by the turnip root fly, Hylemya floralis

H. Alborn, G. Stenhagen, L. Lundgren, 1985 .

Resistance of cruciferous crops to turnip root fly

Per Ruuth, 1988 .

Development and evaluation of laboratory testing methods for winterhardiness breeding

S. Larsson, A. Larsen, B. Gudleifsson, 1996 .