@article{MakaiPapSzabo2007, author = {Makai, M. and Pap, G. and Szab{\´o}, J{\´a}cint}, title = {Matching problems in polymatroids without double circuits}, journal = {Integer Programming and Combinatorial Optimization}, publisher = {Springer}, pages = {167 -- 181}, year = {2007}, language = {en} } @article{MakaiSzabo2008, author = {Makai, M. and Szab{\´o}, J{\´a}cint}, title = {The parity problem of polymatroids without double circuits}, volume = {28}, journal = {Combinatorica}, number = {6}, publisher = {Springer}, pages = {679 -- 692}, year = {2008}, language = {en} }