Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_2006_79_2_a9, author = {Yu. N. Sirota and A. O. Smirnov}, title = {The {Heun} {Equation} and the {Darboux} {Transformation}}, journal = {Matemati\v{c}eskie zametki}, pages = {267--277}, publisher = {mathdoc}, volume = {79}, number = {2}, year = {2006}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_2006_79_2_a9/} }
Yu. N. Sirota; A. O. Smirnov. The Heun Equation and the Darboux Transformation. Matematičeskie zametki, Tome 79 (2006) no. 2, pp. 267-277. http://geodesic.mathdoc.fr/item/MZM_2006_79_2_a9/