@article{SIGMA_2009_5_a48,
     author = {Simon N. M. Ruijsenaars},
     title = {Hilbert{\textendash}Schmidt {Operators} vs. {Integrable} {Systems} of {Elliptic} {Calogero{\textendash}Moser} {Type.} {III.~The} {Heun} {Case}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2009},
     volume = {5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2009_5_a48/}
}