Bracamonte M, Gimenez J, Merentes N. On the first and second variation in the sense of Schramm-Riesz. Publ.Cienc.Tecnol [Internet]. 2013 Jun. 19 [cited 2026 Oct. 5];7(1):37-50. Available from: https://mail.revistas.uclave.org/index.php/pcyt/article/view/740