@article{oai:ynu.repo.nii.ac.jp:00009072,
 author = {Matsumoto, Naoki and Nakamoto, Atsuhiro and Yonekura, Shin-ichi},
 journal = {Yokohama Mathematical Journal},
 month = {},
 pages = {117--129},
 title = {Quadrangulations on the projective plane with a K3;4-minor},
 volume = {63},
 year = {2017}
}