TY - JOUR AU - E. F. Assmus Jr. TI - On 2-ranks of Steiner triple systems JO - The electronic journal of combinatorics PY - 1995 VL - 2 UR - http://geodesic.mathdoc.fr/articles/10.37236/1203/ DO - 10.37236/1203 ID - 10_37236_1203 ER -