@misc{Sasse1990,
  author    = {Hans-J{\"u}rgen Sasse},
  title     = {Theory of language death und Language decay and contact-induced change : similarities and differences ; [the following two papers were presented at the International Symposium on Language Death in East Africa, Bad Homburg, January 8 - 12, 1990]},
  booktitle = {Institut f{\"u}r Linguistik (K{\"o}ln). Abteilung Allgemeine Sprachwissenschaft: Arbeitspapier ; N.F., Nr. 12},
  issn      = {1615-1496},
  institution = {Extern},
  series    = {Arbeitspapier / Institut f{\"u}r Sprachwissenschaft, Universit{\"a}t K{\"o}ln},
  number    = {N.F. 12},
  type      = {workingpaper},
  pages     = {56},
  year        = {1990},
}