Approximate min-max relations for odd cycles in planar graphs.

Samuel Fiorini Nadia Hardy Bruce A. Reed Adrian Vetta Approximate min-max relations for odd cycles in planar graphs. 71-91 2007 110 Math. Program. 1 http://dx.doi.org/10.1007/s10107-006-0063-7 db/journals/mp/mp110.html#FioriniHRV07