Atmini, Dhoruri, M.S. and Eminugroho Ratna, Sari, M.Sc and Dwi, Lestari, M.Sc (2013) OPTIMISASI RUTE DISTRIBUSI LIQUIFIED PETROLEUM GAS (LPG) DI KOTA YOGYAKARTA DENGAN MODEL VEHICLE ROUTING PROBLEM (VRP) MELALUI PENDEKATAN GOAL PROGRAMMING. [Experiment/Research]