TY - JOUR AU - Thang Van Pham AU - Anh Vinh Le TI - Orthogonal systems in vector spaces over finite rings JO - The electronic journal of combinatorics PY - 2012 VL - 19 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.37236/2147/ DO - 10.37236/2147 ID - 10_37236_2147 ER -