@article{paperid:1034590,
author = {S.M. Tavakkoli and Hassani, Behrooz and H. Ghasemnejad},
title = {Derivation of incompatible modes in non-conforming finite elements using hierarchical shape functions},
journal = {Asian Journal of Civil Engineering-Building And Housing},
year = {2005},
volume = {6},
number = {3},
month = {September},
issn = {1563-0854},
pages = {153--165},
			numpages = {12},
keywords = {topology optimization; noise cleaning; non-conforming elements},
}