【在 f**n 的大作中提到】 : A branch-and-price algorithm for a hierarchical crew scheduling problem : by Diego B.C. Faneyte, Frits C.R. Spieksma, Gerhard J. Woeginger : in Naval Research Logistics (NRL) Volume 49 Issue 8, Pages 743 - 759 : http://www3.interscience.wiley.com/cgi-bin/fulltext/100520265/PDFSTART : Please email to h*******[email protected] : Many thanks!