@article{JGAA_2008_12_1_a6,
     author = {Stephen Kobourov and Matthew Landis},
     title = {Morphing {Planar} {Graphs} in {Spherical} {Space}},
     journal = {Journal of Graph Algorithms and Applications},
     pages = {113--127},
     publisher = {mathdoc},
     volume = {12},
     number = {1},
     year = {2008},
     doi = {10.7155/jgaa.00162},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.7155/jgaa.00162/}
}