中国科学院数学与系统科学研究院期刊网
PRE-TRANSFORMED METHODS FOR EIGEN-PROBLEMS Ⅱ: EIGEN-STRUCTURE FOR LAPLACE EIGEN-PROBLEM OVER ARBITRARY TRIANGLES
Sun Jiachang
Mathematica Numerica Sinica . 2012, (1): 1 -24 .  DOI: 10.12286/jssx.2012.1.1