Bihang till Kongl. Svenska Vetenskaps-Akademiens Handlingar. Stockholm

• 1 December 1893
• journal article
• research article
• Published by Springer Nature in Rendiconti del Circolo Matematico di Palermo Series 2
• Vol. 7  (1) , 40
• https://doi.org/10.1007/bf03017646

Abstract