List of Articles soft time window Open Access Article Abstract Page Full-Text 1 - A New Mathematical Model for the Green Vehicle Routing Problem by Considering a Bi-Fuel Mixed Vehicle Fleet Neda Manavizadeh Hamed Farrokhi-Asl Stanley Frederick W.T. Lim 10.22094/joie.2020.1871922.1667 Open Access Article Abstract Page Full-Text 2 - A goal programming model for vehicle routing problem with backhauls and soft time windows M Aghdaghi F Jolai