Robuta

https://www.zurnalai.vu.lt/LMJ/article/view/19993/19123 View of Theorem on the argument of the almost periodic function of many variables | Lithuanian... The first 12 volumes (1961-1972) of the Lithuanian Mathematical Journal (also known as Литовский математический сборник, Lietuvos matematikos rinkinys),... almost periodic functionthe argumentviewtheoremmany