Kashfiyot
Xizmatlar
Identifikatsiya
Ishlab chiquvchilar uchun
Ekotizim
15 ta ish
Ish: Bounds on the first outdegree Zagreb index of digraphs
Roberto Todeschini, Viviana Consonni
Hilal A. Ganie, Yilun Shang
Piotr Biler, Alfred Witkowski