TY - JOUR AU - Xiannan Li TI - Variation of the argument of the Riemann $\xi $ function on vertical lines JO - Acta Arithmetica PY - 2009 SP - 277 EP - 284 VL - 137 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/aa137-3-7/ DO - 10.4064/aa137-3-7 LA - en ID - 10_4064_aa137_3_7 ER -