TY - JOUR AU - ARSENIY AKOPYAN AU - SERGEY AVVAKUMOV TI - ANY CYCLIC QUADRILATERAL CAN BE INSCRIBED IN ANY CLOSED CONVEX SMOOTH CURVE JO - Forum of Mathematics, Sigma PY - 2018 VL - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1017/fms.2018.7/ DO - 10.1017/fms.2018.7 LA - en ID - 10_1017_fms_2018_7 ER -