@article{MZ_1988__198_3_173918,
     author = {M. Hoffmann-Ostenhof},
     title = {Asymptotics of the {Nodal} {Lines} of {Solutions} of {2-Dimensional} {Schr\"odinger} {Equations.}},
     journal = {Mathematische Zeitschrift},
     pages = {161--180},
     publisher = {mathdoc},
     volume = {198},
     number = {3},
     year = {1988},
     zbl = {0627.35024},
     url = {http://geodesic.mathdoc.fr/item/MZ_1988__198_3_173918/}
}