1. P.R. Halmos, Naive Set Theory. D. Van Nostrand Company (Princeton, NJ, 1960)
2. Reprinted by Springer, New York (1974)
3. Interval Computations, a thematic web-site.
http://cs.utep.edu/interval-comp/index.html
4. Interval Analysis and its Applications, a thematic web-site.
http://www.nsc.ru/interval
5. S.I. Kabanikhin, Inverse and Ill-Posed Problems, Theory and Applications (De Gruyter, Berlin, 2011)