Bau, Sheng, Beineke, Lowell W., Du, Genmin, Liu, Zhishan, and Vandell, Robert C. “Decycling Cubes and Grids”. Utilitas Mathematica 59 (May 9, 2001). Accessed November 13, 2025. https://utilitasmathematica.com/index.php/Index/article/view/233.