TY - JOUR AU - WENPENG, ZHANG TI - A MEAN VALUE RELATED TO D. H. LEHMER'S PROBLEM AND THE RAMANUJAN'S SUM* JO - Glasgow mathematical journal PY - 2012 SP - 155 EP - 162 VL - 54 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0017089511000498/ DO - 10.1017/S0017089511000498 ID - 10_1017_S0017089511000498 ER -