@article{MarkgrafCortDavisetal.1991,
  author    = {J. H. Markgraf and J. R. Cort and H. A. Davis and N. I. Lindeman and C. R. Myers and A. Kraft and Manfred Christl},
  title     = {Strained Heterocyclic Systems. 20. Basicities of Bicyclic Quinoxalines},
  year      = {1991},
}