@article{ChristlKrimmKraft1990,
  author    = {Christl, Manfred and Krimm, Stefan and Kraft, Arno},
  title     = {Einige Valene von benzanellierten f{\"u}nfgliedrigen Heteroarenen - Synthesen und NMR-Spektren},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31559},
  year      = {1990},
  abstract  = {No abstract available},
  language  = {de}
}
@article{GigstadRicciJRMarkgrafetal.1991,
  author    = {Gigstad, Kenneth M. and Ricci JR., John S. and Markgraf, J. Hodge and Christl, Manfred and Kraft, Arno},
  title     = {Strained Heterocyclic Systems : 18. Structure of 1,2,3-Methylidyne-2,3-dihydro-1H-cyclopenta[b]quinoxaline},
  isbn      = {0108-2701},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-41645},
  year      = {1991},
  abstract  = {No abstract available},
  language  = {en}
}
@article{ChristlKrimmKraft1990,
  author    = {Christl, Manfred and Krimm, Stefan and Kraft, Arno},
  title     = {Some Valenes of Benzannelated Five-Membered Heteroarenes - Synthesis and NMR Spectra},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30026},
  year      = {1990},
  abstract  = {No abstract available},
  language  = {en}
}