Stanislav Zivny. The complexity and expressive power of valued constraints. PhD thesis, University of Oxford, UK, 2009. [doi]
@phdthesis{ethos-4590, title = {The complexity and expressive power of valued constraints}, author = {Stanislav Zivny}, year = {2009}, url = {http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.510411}, note = {British Library, EThOS}, researchr = {https://researchr.org/publication/ethos-4590}, cites = {0}, citedby = {0}, school = {University of Oxford, UK}, }