TY - JOUR T1 - Existential monadic second order logic of undirected graphs: The Le Bars conjecture is false JO - Annals of Pure and Applied Logic UR - http://dx.doi.org/10.1016/j.apal.2018.12.001 PY - 2019/04/01 AU - Popova SN AU - Zhukovskii ME ED - DO - DOI: 10.1016/j.apal.2018.12.001 PB - Elsevier BV VL - 170 IS - 4 SP - 505 EP - 514 Y2 - 2024/10/23 ER -