Schmitter, Beat M., and Toni Rihs. “Feed Stuffs Analysis at the Swiss Federal Research Station for Animal Production (RAP), Posieux : Die Futtermittelanalytik an Der Eidgenössischen Forschungsanstalt für Nutztiere (RAP) in Posieux”. CHIMIA, vol. 51, no. 10, Oct. 1997, p. 777, https://doi.org/10.2533/chimia.1997.777.