中国科学院数学与系统科学研究院期刊网
AMS
Constant Angle Surfaces in the Heisenberg Group
Johan FASTENAKELS, Marian Ioan MUNTEANU, Joeri VAN DER VEKEN
Acta Mathematica Sinica . 2011, (4): 747 -756 .  DOI: 10.1007/s10114-011-8428-0