Digitized archive of the Kodaikanal images: Representative results of solar cycle variation from sunspot area determinationB. Ravindra, T. G. Priya, K. Amareswari, M. Priyal, A. A. Nazia and D. BanerjeeA&A, 550 (2013) A19DOI: https://doi.org/10.1051/0004-6361/201220416
