1. Appell, J., Frovola, E.V., Kalitvin, A.S., Zabrejko, P.P.: Partial intergal operators on $$C([a, b] \times [c, d])$$ C ( [ a , b ] × [ c , d ] ) . J. Integral Equ. Appl. 27, 125–140 (1997)
2. Appell, J., Kalitvin, A.S., Nashed, M.Z.: On some partial integral equations arising in the mechanics of solids. J. Appl. Math. Mech. 79, 703–713 (1999)
3. Appell, J., Kalitvin, A.S., Zabrejko, P.P.: Partial integral operators in Orlicz spaces with mixed norm. Colloq. Math. 78, 293–306 (1998)
4. Brunk, H.D.: On an extension of the concept conditional expectation. Proc. Am. Math. Soc. 14, 298–304 (1963)
5. Campbell, J.T., Lambert, A., Weinstock, B.M.: Localizing sets and the structure of sigma-algebras. Indiana Univ. Math. J. 47, 913–938 (1998)