Bounded Radial Variation and Divergence of Power Series. George Piranian — 1966 Mathematica Scandinavica
The orders of lacunarity of a power series. George Piranian — 1956 Bollettino dell'Unione Matematica Italiana
Tsuji functions with segments of Julia. E.F. Collingwood; George Piranian — 1964 Mathematische Zeitschrift
Level sets of infinite length. George Piranian; Allen Weitsman — 1978 Commentarii mathematici Helvetici
Sets of divergence of Taylor series and of trigonometric series PAUL ERDÖS; FRITZ HERZOG; GEORGE PIRANIAN — 1954 Mathematica Scandinavica