S Heydari,
N Ahanjideh - Сибирские электронные математические …, 2016 - mathnet.ru
Let 𝐺 be a finite group, and let 𝜌 (𝐺) be the set of prime divisors of the irreducible character
degrees of 𝐺. The character degree graph of 𝐺, denoted by Δ (𝐺), is a graph with vertex set …