EpsteinA. N.Water intake without the act of drinking. Science, 1960, 131, 497–498.
2.
KohnM.Satiation of hunger from food injected directly into the stomach versus food ingested by mouth. J. comp. physiol. Psychol., 1951, 44, 412–422.
3.
JamesW. T.An operant liquid dropping apparatus for rats. J. genet. Psychol., 1955, 53, 175–177.
4.
MillerN. E.KensenM. L.Reward effects of food via stomach fistula compared with those of food via mouth. J. comp. physiol. Psychol., 1952, 45, 555–564.
5.
MillerN. E.SamplerR. I.WoodrowP.Thirst-reducing effects of water by stomach versus water by mouth measured by both a consummatory and instrumental response. J. comp. physiol. Psychol., 1957, 50, 1–5.
