Yield and composition of milk from Polish Holstein-Friesian and Jersey cows in particular months of the first lactations as dependent on milk protein polymorphism Micinski, J.; Jastrzebski, M.; Klupczynski, J. Archiv fuer Tierzucht 51(3): 216-223 2008 https://eurekamag.com/research/024/148/024148953.php