% booktitle = {The Annual International Conference of the German Operations
% Research Society (GOR), Jointly Organized with the Austrian Society of
% Operations Research ({\" O}GOR) and the Swiss Society of Operations
% Research (SVOR), Saarbr{\" u}cken, {S}eptember 5–-7, 2007}, 
% {P}ost-proceedings},
% volume = {2007}

@inproceedings{Marecek2008GOR,
 title = {Penalising Patterns in Timetables: 
          Novel Integer Programming Formulations},
 author = {Edmund K. Burke and Jakub Mare{\v c}ek
           and Andrew J. Parkes and Hana Rudov{\' a}},
 booktitle = {Operations Research Proceedings 2007},
 editor = {Stefan Nickel and J{\" o}rg Kalcsics},
 publisher = {Springer},
 address = {Berlin},
 year = {2008},
 pages = {409--414}
 series = {Operations Research Proceedings},
 doi = {http://dx.doi.org/10.1007/978-3-540-77903-2_63},
 url = {http://www.cs.nott.ac.uk/~jxm/timetabling/gor2007-paper.pdf}
}