@article{HaenselWaclawekWeigtetal.1994,
  author    = {Horst H{\"a}nsel and W. Waclawek and Harry Weigt and A. Kwak},
  title     = {Phthalocyanine chemisensors, part I : oscillation spectra of lanthanide diphthalocyanines},
  year      = {1994},
}