TY - JOUR AU - Samperton, Eric G. TI - Free actions on surfaces that do not extend to arbitrary actions on 3-manifolds JO - Comptes Rendus. Mathématique PY - 2022 SP - 161 EP - 167 VL - 360 IS - G2 PB - Académie des sciences, Paris UR - http://archive.numdam.org/articles/10.5802/crmath.277/ DO - 10.5802/crmath.277 LA - en ID - CRMATH_2022__360_G2_161_0 ER -