@article{SIGMA_2018_14_a135,
     author = {Howard S. Cohl and Thinh H. Dang and T. M. Dunster},
     title = {Fundamental {Solutions} and {Gegenbauer} {Expansions} of {Helmholtz} {Operators} in {Riemannian} {Spaces} of {Constant} {Curvature}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2018},
     volume = {14},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2018_14_a135/}
}