BanakhT. O.; KutsakS. M.; MaslyuchenkoV. K.; MaslyuchenkoO. V. Direct and Inverse Problems of Baire Classification of Integrals Depending on a Parameter. Ukrains’kyi Matematychnyi Zhurnal, v. 56, n. 11, p. 1443-1457, 25 Nov. 2004.