Trager M, Wilson GT, Hartnett DC. Interactive effects of burn regime and bison activity on tallgrass prairie vegetation. American Midland Naturalist. 2004;152:237 -247.

Owens A, Trager M, Horne E. Phrynosoma cornutum (Texas horned lizard) reproduction. Herpetological Review. 2002;33:308 -309.