@article{10_1155_S0161171202207188,
     author = {Cotton, Andrew and Freeman, David},
     title = {The double bubble problem in spherical and hyperbolic space.},
     journal = {International Journal of Mathematics and Mathematical Sciences},
     pages = {641},
     publisher = {mathdoc},
     volume = {32},
     number = {11},
     year = {2002},
     doi = {10.1155/S0161171202207188},
     zbl = {1036.49039},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/articles/10.1155/S0161171202207188/}
}