@article{AFM_1976_2_1_a38,
     author = {\r{A}ke Pleijel},
     title = {On the boundary condition for the {Legendre} polynomials},
     journal = {Annales Fennici Mathematici},
     pages = {397--408},
     publisher = {mathdoc},
     volume = {2},
     number = {1},
     year = {1976},
     doi = {10.5186/aasfm.1976.0227},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1976.0227/}
}