@article{945280,
      author = {Bennewitz, Christer, and Brown, Malcolm, and Weikard,  Rudi,},
      url = {http://library.usi.edu/record/945280},
      title = {Spectral and scattering theory for ordinary differential  equations., Vol. I,: Sturm--Liouville equations /},
      doi = {https://doi.org/10.1007/978-3-030-59088-8},
      recid = {945280},
      pages = {1 online resource (384 pages).},
}