TY - JOUR AU - Crump, Iain AU - DeVos, Matt AU - Yeats, Karen TI - Period preserving properties of an invariant from the permanent of signed incidence matrices JO - Annales de l’Institut Henri Poincaré D PY - 2016 SP - 429 EP - 454 VL - 3 IS - 4 UR - http://archive.numdam.org/articles/10.4171/aihpd/35/ DO - 10.4171/aihpd/35 LA - en ID - AIHPD_2016__3_4_429_0 ER -