On illuminations of C2-surfaces in vector graphic description. - Johann Lang (Comput. Graph., 1988)

Developable (1, n) - Bézier surfaces. - Johann Lang; Otto Röschel (Comput. Aided Geom. Des., 1992)

Car side window kinematics. - Anton Gfrerrer; Johann Lang; Alexander Harrich; Mario Hirz; Johannes Mayr (Comput. Aided Des., 2011)