[8] Foxby, H.-B., Iyengar, S.: 
Depth and amplitude for unbounded complexes. Commutative algebra. Interactions with algebraic geometry L. L. Avramov, M. Chardin, M. Morales, C. Polini Contemporary Mathematics 331, American Mathematical Society, Providence (2003), 119-137. 
DOI 10.1090/conm/331 | 
MR 2013162 | 
Zbl 1096.13516