Li, Liang, and Dejun Wu. “On the Restricted Projective Dimension of Complexes”. Ukrains’kyi Matematychnyi Zhurnal 65, no. 7 (July 25, 2013): 936–945. Accessed April 25, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2479.