@article{10_4153_S0008414X19000336,
     author = {Kokotov, Alexey and Lagota, Kelvin},
     title = {Green {Function} and {Self-adjoint} {Laplacians} on {Polyhedral} {Surfaces}},
     journal = {Canadian journal of mathematics},
     pages = {1324--1351},
     year = {2020},
     volume = {72},
     number = {5},
     doi = {10.4153/S0008414X19000336},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008414X19000336/}
}