TY - JOUR AU - G. Gát TI - On almost even arithmetical functions via orthonormal systems on Vilenkin groups JO - Acta Arithmetica PY - 1991 SP - 105 EP - 123 VL - 60 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/aa-60-2-105-123/ DO - 10.4064/aa-60-2-105-123 LA - en ID - 10_4064_aa_60_2_105_123 ER -