@article{GutscherMiihlethalerPortmannetal.1989,
  author    = {Daniel Gutscher and Bruno Miihlethaler and Armin Portmann and Armin Reller},
  title     = {Conversion of azurite into tenorite},
  journal   = {Studies in Conservation},
  volume    = {34},
  number    = {3},
  pages     = {117 -- 122},
  doi       = {10.1179/sic.1989.34.3.117},
  year      = {1989},
}