TY - JOUR AU - Hilton, Peter AU - Roitberg, Joseph TI - Relative epimorphisms and monomorphisms in homotopy theory JO - Compositio Mathematica PY - 1987 DA - 1987/// SP - 353 EP - 367 VL - 61 IS - 3 PB - Martinus Nijhoff Publishers UR - http://www.numdam.org/item/CM_1987__61_3_353_0/ UR - https://zbmath.org/?q=an%3A0624.55005 UR - https://www.ams.org/mathscinet-getitem?mr=883488 LA - en ID - CM_1987__61_3_353_0 ER -