Rotation Invariance in Edge Detection. - Djemel Ziou; Jean-Pierre Fabre (CAIP, 1993)

Performance evaluation of first order operators. - Djemel Ziou; Jean-Pierre Fabre; Shengrui Wang (ICPR (1), 1994)

Effects of edge orientation on the performance of first-order operators. - Djemel Ziou; Jean-Pierre Fabre (Pattern Recognit. Lett., 1994)