Wizkam’, A. C. P., G. Van Tintelen, and A. C. Beynen. “Technical Note Communication: Frequency Ofchanging Solid-Walled Cages Does Not Affect Pentobarbitone-Induced Sleeping Time in Rats and Mice”. Scandinavian Journal of Laboratory Animal Science, vol. 16, no. 4, Dec. 1989, doi:10.23675/sjlas.v16i4.695.