1.
Burger A.P., Grobler P.J.P., Nieuwoudt I., Van Vuuren J.H. On an open problem in defective graph colourings. A Canadian journal of applied mathematics, computer science and statistics [Internet]. 2008 Jun. 9 [cited 2026 May 8];76. Available from: https://utilitasmathematica.com/index.php/Index/article/view/557