TY - JOUR AU - H. Kharaghani TI - On the twin designs with the Ionin-type parameters JO - The electronic journal of combinatorics PY - 2000 VL - 7 UR - http://geodesic.mathdoc.fr/articles/10.37236/1479/ DO - 10.37236/1479 ID - 10_37236_1479 ER -