MR0204875 (34 #4710) Lewy, Hans On the extension of harmonic functions in three variables. J. Math. Mech. 14 1965 925--927. (Reviewer: S. Itô) 35.75 (31.00) MR0435425 (55 #8385) Levi, G. Generalization of a spatial angle theorem. (Russian) Translated from the English by Ju. V. Egorov. Uspehi Mat. Nauk 26 (1971), no. 2(158), 199--204. 31B05 MR0513380 (80d:32006) Lewy, Hans On the relation between analyticity in one and in several variables. Complex analysis and its applications (Russian), pp. 324... read more
