Akar H. Karim, Nabeel E. Arif, Ayad M. Ramadan. The M-Polynomial and Nirmala index of Certain Composite Graphs. Tikrit J. Pure Sci. [Internet]. 2022 Nov. 29 [cited 2024 May 18];27(3):92-101. Available from: https://tjps.tu.edu.iq/index.php/tjps/article/view/45