Joss, V. Der Musikpädagoge Friedrich Wieck und seine Familie, 1902 (Clara Wieck-Schumann)
Grove music online, Oct. 16, 2009 (Schumann (née Wieck), Clara (Josephine); b. Sept. 13, 1819, Leipzig, d. May 20, 1896, Frankfurt; German pianist, composer, and teacher; wife of Robert Schumann)