TY - JOUR AU - Alan S. Cigoli AU - Sandra Mantovani AU - Giuseppe Metere TI - Peiffer product and Peiffer commutator for internal pre-crossed modules JO - Homology, homotopy, and applications PY - 2017 SP - 181 EP - 207 VL - 19 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4310/HHA.2017.v19.n1.a10/ DO - 10.4310/HHA.2017.v19.n1.a10 LA - en ID - HHA_2017_19_1_a9 ER -