@article{AIHPC_2009__26_4_1081_0,
     author = {Bonnard, Bernard and Caillau, Jean-Baptiste and Sinclair, Robert and Tanaka, Minoru},
     title = {Conjugate and {Cut} {Loci} of a {Two-Sphere} of {Revolution} {With} {Application} to {Optimal} {Control}},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {1081--1098},
     publisher = {Elsevier},
     volume = {26},
     number = {4},
     year = {2009},
     doi = {10.1016/j.anihpc.2008.03.010},
     mrnumber = {2542715},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1016/j.anihpc.2008.03.010/}
}