Lillie, R. S. 1908. The relation of ions to contractile processes. Amer. Jour. Physiol., Vol. 22, pp. 75-90.

Loeb, J. 1900. Comparative physiology of the brain and comparative psychology. New York.

Loeb, J. 1906. The dynamics of living matter. New York.

Loeb, J. 1918. Forced movements, tropisms and animal conduct. Philadelphia.

McClendon, J. F. 1909. Protozoan studies. Jour. Exp. Zoöl., Vol. 6, pp. 265-283.

McClendon, J. F. 1911. Ein Versuch amoeboide Bewegung als Folgeerscheinung wechselnden elektrischen Polarisationszustandes der Plasmahaut zu erklären. Arch. f. d. ges. Physiol., Vol. 140, pp. 271-280.

Mach, E. 1875. Grundlinien der Lehre von der Bewegungsempfindungen. Leipzig.

Mast, S. O. 1910. Light and the behavior of organisms.

Mast, S. O., and Root, F. M. 1916. Observations on ameba feeding on rotifers, nematodes and ciliates and their bearing on the surface tension theory. Jour. Exp. Zoöl., Vol. 21, pp. 33-51.

Mathews, A. P. 1916. Physiological chemistry. Sec. Ed. New York.