Hoff, G. R. (2009). "Embryo developmental events and the egg case of the Aleutian skate Bathyraja aleutica (Gilbert) and the Alaska skate Bathyraja parmifera (Bean)". Journal of Fish Biology. 74 (3): 483–501. Bibcode:2009JFBio..74..483H. doi:10.1111/j.1095-8649.2008.02138.x.
Hoff, G. R. (2009). "Embryo developmental events and the egg case of the Aleutian skate Bathyraja aleutica (Gilbert) and the Alaska skate Bathyraja parmifera (Bean)". Journal of Fish Biology. 74 (3): 483–501. Bibcode:2009JFBio..74..483H. doi:10.1111/j.1095-8649.2008.02138.x.