Internet, http://authorities.loc.gov, 2010-02-23
Internet, https://www.wikidata.org/wiki/Q28056173, 2020-09-22
Information trouvée : Izrail Solomonovich Gradshteyn (1899-1958), mathématicien russe
Table of integrals, series, and products / I. S. Gradshteyn and I. M. Ryzhik, 1980