Bîrsan, Temistocle; Tiba, Dan (2006), "One hundred years since the introduction of the set distance by Dimitrie Pompeiu", in Ceragioli, Francesca; Dontchev, Asen; Futura, Hitoshi; Marti, Kurt; Pandolfi, Luciano (eds.), System Modeling and Optimization, vol. 199, Boston: Kluwer Academic Publishers, pp. 35–39, doi:10.1007/0-387-33006-2_4, ISBN978-0-387-32774-7, MR2249320
Bîrsan, Temistocle; Tiba, Dan (2006), "One hundred years since the introduction of the set distance by Dimitrie Pompeiu", in Ceragioli, Francesca; Dontchev, Asen; Futura, Hitoshi; Marti, Kurt; Pandolfi, Luciano (eds.), System Modeling and Optimization, vol. 199, Boston: Kluwer Academic Publishers, pp. 35–39, doi:10.1007/0-387-33006-2_4, ISBN978-0-387-32774-7, MR2249320