Journal Article
Boro Saikia, S.; Jeffers, S. V.; Morin, J.; Petit, P.; Folsom, C. P.; Marsden, S. C.; Donati, J.-F.; Cameron, R.; Hall, J. C.; Perdelwitz, V. et al.; Reiners, A.; Vidotto, A. A.: A solar-like magnetic cycle on the mature K-dwarf 61 Cygni A (HD 201091). Astronomy and Astrophysics
594, A29 (2016)