http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
proceedings of a conference held at Dubrovnik, Yugoslavia, November 2-14, 1981
edited by D. Butkovic, H. Kraljevic, and S. Kurepa.
Lecture notes in mathematics (Springer-Verlag) ; 948