TY - JOUR AU - Peter J. Giblin AU - Stanisław Janeczko, AU - Maria Aparecida Ruas TI - Reflexion maps and geometry of surfaces in R^4 JO - Journal of Singularities PY - 2020 SP - 84 EP - 96 VL - 21 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.5427/jsing.2020.21e/ DO - 10.5427/jsing.2020.21e ID - 10_5427_jsing_2020_21e ER -