"On a class of additive functionals of two-dimensional Brownian motion and random walk"
Endre Csáki, Miklós Csörgö, Antónia Földes and Zhan Shi
Keywords: Additive functional, Brownian motion, random walk, strong approximation.
AMS 1991 subject classification: Primary 60J15; Secondary 60F15, 60J55.