Whisman, Marvin L., John W. Goetzinger, Faye O. Cotton, and Dennis W. Brinkman. "Odorant evaluation: a study of ethanethiol and tetrahydrothiophene as warning agents in propane." Environmental and Science and Technology 12/12 (November 1978): 1285–1288.

Whisman, Marvin L., John W. Goetzinger, Faye O. Cotton, and Dennis W. Brinkman. "Odorant evaluation: a study of ethanethiol and tetrahydrothiophene as warning agents in propane." Environmental and Science and Technology 12/12 (November 1978): 1285–1288.