E A Schäfer

On the Rhythm of Muscular Response to Volitional Impulses in Man

E. Schäfer, E A Schäfer, 1886, The Journal of physiology.

Experiments on the character of the Muscular Contractions which are evoked by Excitation of the various parts of the Motor Tract

V Horsley, V. Horsley, E. Schäfer, 1886, The Journal of physiology.