Buchler, E. 1976. "The use of echolocation by the wandering shrew (Sorex vagrans)." Animal Behaviour 24 (4): 858–73. doi:10.1016/S0003-3472(76)80016-4.
Forsman, K. A., et M. G. Malmquist. 1988. "Evidence for echolocation in the common shrew, Sorex araneus." Journal of Zoology 216 (4): 655. doi:10.1111/j.1469-7998.1988.tb02463.x.