What is distance? /
Shreider, IUriĭ Anatol'evich.
Cohn, Leslie.
Edelberg, Harvey.
Chicago London University of Chicago Press
1974
Translation and revision of: 'Chto takoe rasstoianie?'. Moscow : Gos. izd-vo fiziko-matematicheskoĭ lit-ry, 1963
Metric spaces.
Distance geometry.