These are two of the authors of Generalized Flatfand to be published in The Mathematical Intelligencer . The third author, Burkard, 'the Triangle' Polster is depicted below.
Some people claim that mankind is related to monkeys.
Well, when I was younger I went to the zoo in Stuttgart to check this out. Guess what, it's all wrong. Just look at the next picture. For years this photo hang on my office door, hence it is a bit faded and stained. But it is the only copy I have got.