Herra, J.; Schley, L.; Engel, E. & Roper, T. J. (2010). "Den preferences and denning behaviour in urban stone martens (Martes foina)". Mammalian Biology - Zeitschrift für Säugetierkunde. 75 (2): 138–145. Bibcode:2010MamBi..75..138H. doi:10.1016/j.mambio.2008.12.002.
Herra, J.; Schley, L.; Engel, E. & Roper, T. J. (2010). "Den preferences and denning behaviour in urban stone martens (Martes foina)". Mammalian Biology - Zeitschrift für Säugetierkunde. 75 (2): 138–145. Bibcode:2010MamBi..75..138H. doi:10.1016/j.mambio.2008.12.002.