@article{10_37236_8255,
     author = {Yongxin Lan and Yongtang Shi and Zi-Xia Song},
     title = {Extremal {\(H\)-free} planar graphs},
     journal = {The electronic journal of combinatorics},
     year = {2019},
     volume = {26},
     number = {2},
     doi = {10.37236/8255},
     zbl = {1412.05051},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/8255/}
}