Agnarsson, Geir, Raymond Greenlaw, and Sanpawat Kantabutra. “The Structure of Rooted Weighted Trees Modeling Layered Cyber-Security Systems”. Acta Cybernetica 22, no. 4 (January 1, 2016): 25-59. Accessed December 3, 2024. https://cyber.bibl.u-szeged.hu/index.php/actcybern/article/view/3906.