Author: LÉVY Lucien :
Title: Sur les systèmes de surfaces triplement orthogonaux.
Description: .: 0. Brussels, Royal Academy (Academie royale de Belgique), 1896, in-4°, 92 pp . Published as a treatise in the yearbook of the Academy (Volume LIV), loose, no wrapper (in need of a binding, removed from the yearbook). Publié dans le Tôme 54 des Mémoire couronnés et Mémoires des Savants Étrangers de L'Academie Royale (de Belgique). (see bibliography = Tables Générale des Mémoires items 772). The mathematician was awarded the gold medal of the Academy for this study. Text in French. .

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