D. C. Opferman

A design methodology for system quality

D. C. Opferman, R. H. Yacobellis, 1986 .

On a class of rearrangeable switching networks part I: Control algorithm

D. C. Opferman, N. T. Tsao-wu, N. Tsao-Wu, 1971 .

Development of electronic tandem service (ETS) features for the dimension PBX

D. C. Opferman, A. M. Gerrish, 1979, COMPSAC.

On a class of rearrangeable switching networks part II: Enumeration studies and fault diagnosis

D. C. Opferman, N. T. Tsao-Wu, 1971 .