Samir Datta Raghav Kulkarni Nutan Limaye Meena Mahajan Planarity, Determinants, Permanents, and (Unique) Matchings. 115-126 2007 conf/csr/2007 CSR http://dx.doi.org/10.1007/978-3-540-74510-5_14 db/conf/csr/csr2007.html#DattaKLM07