Analysis of information sources in references of the Wikipedia article "David van Dantzig" in English language version.
Correspondence David van Dantzig--Gerrit Mannoury October 23rd 1917, after the second lecture in a course on analytical geometry David van Dantzig, student of chemistry, wrote a long letter to the professor of mathematics Gerrit Mannoury. It proved the starting point of a life-long symbiosis of pupil and master in mathematics, metamathematics and significs...