I tried all my methods to find the paper :

“K. Urbanik and WA Woyczynski, A random integral and Orlicz spaces, Bulletin de l'Académie Polonaise des Sciences, Série des sciences mathématiques, astronomiques et physiques, 15 (1967), p. 161-169.”

It is not the first time this paper is requested here. However, the links for this paper always broke. If someone could please help me find this paper I would be extremely grateful!.