Luca Di Gaspero Johannes Gärtner Guy Kortsarz Nysret Musliu Andrea Schaerf Wolfgang Slany The minimum shift design problem. 79-105 2007 155 Annals OR 1 http://dx.doi.org/10.1007/s10479-007-0221-1 db/journals/anor/anor155.html#GasperoGKMSS07