G. Bigio. AFIPS Spring Joint Computing Conference, volume 32 of AFIPS Conference Proceedings, page 183-191. Thomson Book Company, Washington D.C., (1968)
E. Aizenberg, I. Bigio, and E. Rodriguez-Diaz. Image Processing: Algorithms and Systems / Parallel Processing for Imaging Applications, volume 8295 of SPIE Proceedings, page 82950A. SPIE, (2012)