@article{Przesławski:2009,
author
=
"K.Przesławski and L.Rybiński",
title
=
"Concepts of Lower Semicontinuity and Continuous Selections for Convex Valued Multifunctions",
journal
=
"Journal of Approximation Theory",
volume
=
"Vol. 68",
number
=
"iss. 3",
pages
=
"262--282",
year
=
"1992",
}