TY - JOUR AU - Yongxin Lan AU - Yongtang Shi AU - Zi-Xia Song TI - Extremal \(H\)-free planar graphs JO - The electronic journal of combinatorics PY - 2019 VL - 26 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.37236/8255/ DO - 10.37236/8255 ID - 10_37236_8255 ER -