@article{10_1017_S2040618500035590,
     author = {Dougall, John},
     title = {The {Product} of {Two} {Legendre} {Polynomials}},
     journal = {Glasgow mathematical journal},
     pages = {121--125},
     year = {1953},
     volume = {1},
     number = {3},
     doi = {10.1017/S2040618500035590},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S2040618500035590/}
}