@article{MAN_1984__268_182913,
     author = {Jochen Br\"uning},
     title = {Heat {Equation} {Asymptotics} for {Singular} {Sturm-Liouville} {Operators.}},
     journal = {Mathematische Annalen},
     pages = {173--196},
     publisher = {mathdoc},
     volume = {268},
     year = {1984},
     zbl = {0528.34020},
     url = {http://geodesic.mathdoc.fr/item/MAN_1984__268_182913/}
}