MullinW. V.: The Anatomy, Physiology and Diseases of the Salivary Glands, Trans. of the Amer. Acad. Oph. and Otolaryng., Omaha, Douglas Printing Co., pp. 356 and 357, 1929.
3.
SollmanTorald: A Manual of Pharmacology and Its Application to Therapeutics and Toxicology, Edition 6, Philadelphia and London, W. B. Saunders Co., pp. 362–364, p. 421; p. 430; p. 438; 1942;
4.
GoodmanLouisGilmanAlfred: Pharmacological Basis of Therapeutics, New York, MacMillan Co., p. 357, 1941.
5.
BestH. C.TaylorN. B.: The Physiological Basis of Medical Practice, Edition 2, Baltimore, Williams and Wilkins Co., p. 1006; p. 675; 1939.