1. Urges to eat and drink in rats;Adolph;Am J Physiol,1947
2. Light-dark variation in laboratory rat stomach and small intestine content;Armstrong;Physiol Behav,1978
3. Hunger Models;Booth,1978
4. An explanation of hunger;Cannon;Am J Physiol,1912
5. Thirst as a determinant of reinforcement;Collier,1964