Marilyn Breen. Krasnoselskii numbers and non simply connected orthogonal polygons. Ars Comb., 57, 2000.
@article{Breen00,
title = {Krasnoselskii numbers and non simply connected orthogonal polygons},
author = {Marilyn Breen},
year = {2000},
researchr = {https://researchr.org/publication/Breen00},
cites = {0},
citedby = {0},
journal = {Ars Comb.},
volume = {57},
}