Rucinski SM, Walker GA H, Matthews JM, Kuschnig R, Shkolnik E, Marchenko S, Bohlender DA, Guenther D B, Moffat AF J, Sasselov D, et al. Differential Rotation of the Active G5 V Star \ensuremathąppa$^1$ Ceti: Photometry from the MOST Satellite}. \pasp. 2004;116 (826) :1093-1104.