83-106, A Berlin, chez Haude et Spener, Libraires de la Cour et de l'Académie Royale, 1768 in 1749</ref> but it was Malmsten who proved it (Euler only suggested this formula and verified it for several integer and demi-integer values of s).
83-106, A Berlin, chez Haude et Spener, Libraires de la Cour et de l’Académie Royale, 1768 in 1749</ref>, однако именно Мальмстен строго доказал её.