@article{GroetschelJuengerReinelt1991, author = {Martin Gr{\"o}tschel and Michael J{\"u}nger and Gerhard Reinelt}, title = {Optimal Control of Plotting and Drilling Machines}, journal = {Zeitschrift f{\"u}r Operations Research}, volume = {35}, number = {1}, pages = {61 -- 84}, year = {1991}, }