Xu, Xirong, Yuansheng, Yang, Ming, Di. Feedback vertex set of generalized de Bruijn digraphs GB(d,n). A Canadian journal of applied mathematics, computer science and statistics [Internet]. 2009 Jun. 9 [cited 2026 May 8];79. Available from: https://utilitasmathematica.com/index.php/Index/article/view/611