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TITLE: Analysis of full-disc Ca II K spectroheliograms: III. Plage area composite series covering 1892-2019
AUTHORS: Theodosios Chatzistergos; Ilaria Ermolli; Natalie A Krivova; Sami K Solanki; Dipankar Banerjee; Teresa Barata; Marcel Belik; Ricardo Gafeira; Adriana Garcia; Yoichiro Hanaoka; Manjunath Hegde; Jan Klimes; Viktor V Korokhin; Ana Lourenco; Jean Marie Malherbe; Gennady P Marchenko; Nuno Peixinho; Takashi Sakurai; Andrey G Tlatov;
PUBLISHED: 2020, SOURCE: ASTRONOMY & ASTROPHYSICS, VOLUME: 639
INDEXED IN: Scopus WOS