Kaliste—Korhonen, E., S. Eskola, T. Rekilä, and T. Nevalainen. “Effects of Gnawing Material, Group Size and Cage Level in Rack on Wistar Rats”. Scandinavian Journal of Laboratory Animal Science, vol. 22, no. 4, Dec. 1995, doi:10.23675/sjlas.v22i4.778.