@article{YJOR_2008_18_1_a0,
     author = {Yuri Kochetov and Polina Kononova and Mikhail Paschenko},
     title = {Formulation {Space} {Search} {Approach} for the {Teacher/Class} {Timetabling} {Problem}},
     journal = {Yugoslav journal of operations research},
     pages = {1 },
     year = {2008},
     volume = {18},
     number = {1},
     zbl = {1235.90064},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/YJOR_2008_18_1_a0/}
}