@article{KUPFER,
  author = {Kupfer, Marcia},
  interhash = {3b836b546f64c977aadc9976b06fcd33},
  intrahash = {b716c1f6dfd8a5da594b7daa056e0ea4},
  journal = {World & Image. A journal of verbal visual enquiry},
  number = 3,
  pages = {262-288},
  title = {Medieval world maps: embedded images, interpretive frames},
  volume = 10,
  year = 1994
}

@article{KUPFER,
  author = {Kupfer, Marcia},
  interhash = {165332fecc1b54d18772401ce54c88cc},
  intrahash = {7fc70ae94ff8f4736e95c539e9a725b3},
  journal = {The Art Bulletin},
  number = 2,
  pages = {286-310},
  title = {The Lost Wheel Map of Ambrogio Lorenzetti},
  volume = 78,
  year = 1996
}