@article{KazKolRol19, title = {Even Delta-Matroids and the Complexity of Planar Boolean CSPs}, author = {Kazda, A. and Kolmogorov, V.r and Rolinek, M.}, journal = {ACM Transactions on Algorithms}, volume = {15}, number = {2}, pages = {1--33}, year = {2019}, note = {Article No. 22}, doi = {10.1145/3230649} }