中国科学院数学与系统科学研究院期刊网
AMS
The Classification of 2 and 3 Torsion Free Polyhedra
Jian Zhong PAN, Zhong Jian ZHU
Acta Mathematica Sinica . 2015, (11): 1659 -1682 .  DOI: 10.1007/s10114-015-5119-2