2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/2768Near-infrared photometry of planetary nebulae (PNe) allows the classification of those objects. We present the largest homogeneous sample so far, obtained with the Deep Near Infrared Southern Sky Survey (DENIS).3 pages; Proceedings of the symposium "Ionized Gaseous Nebulae", Mexico City, 21-24 November 2000; RevMexAA (Ser. de Conf.), in pressAstrophysicstext