by Herberg, R. J, Van Duyn, R. L
Published in Journal of agricultural and food chemistry (01.07.1969)

by Van Duyn, R L, Folkerts, T M
Published in VM SAC. Veterinary Medicine and Small Animal Clinician (01.03.1979)

by Donoho, Alvin L, Herberg, Richard J, Zornes, Larry L, Van Duyn, Robert L
Published in Journal of agricultural and food chemistry (01.09.1982)

by Potter, E L, VanDuyn, R L, Cooley, C O
Published in Journal of animal science (01.06.1984)