New paper accepted for publication in SORT

A new paper has been accepted for publication in SORT:

S. Nasini, J. Castro, P. Fonseca, A mathematical programming approach for different scenarios of bilateral bartering, Statistics and Operations Research Transactions - SORT, 39 (2015) . Previously appeared as Research Report DR 2013/07, Dept. of Statistics and Operations Research, Universitat Politècnica de Catalunya, 2013.