TY - JOUR AU - LI, TIEQIANG AU - SCHÜTZ, DIRK TI - ON THE RELATIVE LUSTERNIK–SCHNIRELMANN CATEGORY WITH RESPECT TO A REAL COHOMOLOGY CLASS JO - Glasgow mathematical journal PY - 2011 SP - 169 EP - 183 VL - 53 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0017089510000595/ DO - 10.1017/S0017089510000595 ID - 10_1017_S0017089510000595 ER -