Brain potential correlates of supraliminal contrast functions and defocus. - Ove Franzén; Gunnar Lennerstrand; Hans Richter (Int. J. Hum. Comput. Interact., 1994)

PROSA - Process-Oriented Service Level Agreements for Providing a Single Point of Contract. - Rico Knapper; Tobias Conte; Benjamin Blau; Hans Richter (MKWI, 2010)