@article{bbdfv-tsp-09,
author = {Sergey Bereg and Prosenjit Bose and Adrian Dumitrescu and Ferran Hurtado and Pavel Valtr},
title = {Traversing a Set of Points with a Minimum Number of Turns},
journal = {Discrete Comput. Geom.},
year = {2009},
volume = {41},
number = {1},
pages = {513--532},
url = {http://dx.doi.org/10.1007/s00454-008-9127-1}
}