RT Book, Section T1 Sprays sobre trayectorias A1 Lafuente López, Javier PB Ediciones Universidad de Salamanaca SN 84-7481-230-5 YR 1982 FD 1982 LK https://hdl.handle.net/20.500.14352/65442 UL https://hdl.handle.net/20.500.14352/65442 NO Proceedings of the ninth Spanish-Portuguese conference on mathematics. 2 DS Docta Complutense RD 4 abr 2025