TY - JOUR AU - R. Sher TI - Extensions, retracts, and absolute neighborhood retracts in proper shape theory JO - Fundamenta Mathematicae PY - 1977 SP - 149 EP - 159 VL - 96 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/fm-96-2-149-159/ DO - 10.4064/fm-96-2-149-159 LA - en ID - 10_4064_fm_96_2_149_159 ER -