H. Pfaeffle

Multi-directional strength and force envelope of the index finger.

Zong-Ming Li, S. Woo, R. Goitz, 2003, Clinical biomechanics.

A comparison of social adjustment of mentally retarded children in various educational settings.

H. Pfaeffle, W. Kern, 1962, American journal of mental deficiency.

Design of flexible rods with embedded SMA actuators

Dimitris C. Lagoudas, Iradj G. Tadjbakhsh, Kevin C. Craig, 1993, Smart Structures.