Keil, Nina Maria (2000): Development of intersucking in dairy heifers and cows. Diss. EHT Zürich No. 13693.
Keil, N.M., Audigé, L. and Langhans, W. (2000): Factors associated with intersucking in Swiss dairy heifers. Prev. Vet. Med., 45: 305-323.
Keil, N.M., Audigé, L. and Langhans, W. (2001): Is intersucking in dairy cows the continuation of a habit developed in early life? J. Dairy Sci., 84: 140-146.
Keil, N.M. and Langhans, W. (2001): The development of intersucking in dairy calves around weaning. Appl. Anim. Behav. Sci., 72: 295-308.
Keil, N. M. (2000): Development of intersucking in dairy heifers and cows. Diss. ETH Zürich No. 13693.
Keil, N.M., Audigé, L., Langhans, W. (2000): Factors associated with intersucking in Swiss dairy heifers. Prevent. Vet. Med., 45: 305-323.
Keil, N.M., Audigé, L. and Langhans, W. (2001): Is intersucking in dairy cows the continuation of a habit developed in early life? J. Dairy Sci., 84: 140-146.
Keil, N.M. and Langhans, W. (2001): The development of intersucking in dairy calves around weaning. Appl. Anim. Behav. Sci., 72: 295-308.