A review of the distribution of Rhinocheilus l. lecontei, in Utah, with a northward extension of its range in the Upper Colorado River Basin.
Grogan, William L. Jr. and Tanner, Wilmer W.
"Range extension of the long-nosed snake, Rhinocheilus l. lecontei, into east-central Utah,"
Great Basin Naturalist: Vol. 34
, Article 10.
Available at: http://scholarsarchive.byu.edu/gbn/vol34/iss3/10