BibTex format
@article{Frank:2019:spmj/1559,
author = {Frank, RL and Laptev, A},
doi = {spmj/1559},
journal = {St. Petersburg Mathematical Journal},
pages = {573--589},
title = {Bound on the number of negative eigenvalues of two-dimensional Schrödinger operators on domains},
url = {http://dx.doi.org/10.1090/spmj/1559},
volume = {30},
year = {2019}
}