Voipio, H.-M., Korhonen, T., Koistinen, T., Kuronen, H., Mering, S., & Nevalainen, T. (2008). Durability and Hygiene of Aspen Tubes Used for Providing Environmental Complexity for Laboratory Rats. Scandinavian Journal of Laboratory Animal Science, 35(2), 107–115. https://doi.org/10.23675/sjlas.v35i2.136