Lopsidedness in WHISP galaxies - I. Rotation curves and kinematic lopsidedness J. van Eymeren, E. Jütte, C. J. Jog, Y. Stein and R.-J. Dettmar A&A, 530 (2011) A29 Published online: 03 May 2011 DOI: 10.1051/0004-6361/201016177