@article{MZ_1987__194_173825,
     author = {Andreas M. Hinz},
     title = {Asymptotic {Behavior} of {Solutions} of - ...v + qv = ...v  and the {Distance} of ...to the {Essential} {Spectrum.}},
     journal = {Mathematische Zeitschrift},
     pages = {173--182},
     publisher = {mathdoc},
     volume = {194},
     year = {1987},
     zbl = {0622.35053},
     url = {http://geodesic.mathdoc.fr/item/MZ_1987__194_173825/}
}