1. Direct limits of modules of finite projective dimension;Hügel,2004
2. Silvana Bazzoni, Manolo Cortés-Izurdiaga, Sergio Estrada, Periodic modules, Preprint, 2017.
3. All modules have flat covers;Bican;Bull. Lond. Math. Soc.,2001
4. Models for singularity categories;Becker;Adv. Math.,2014
5. Models for singularity categories;Becker;Adv. Math.,2014