Improved Speech Recognition Through Videotelephony: Experiments with the Hard of Hearing. - Han W. Frowein; Guido F. Smoorenburg; Liesbeth Pyters; Dolf Schinkel (IEEE J. Sel. Areas Commun., 1991)

Coding and interworking for videotelephony. - Ming-Ting Sun; Karel Rijkse; Dolf Schinkel; Arthur Meijboom (ISCAS, 1993)