@inbook {Simula.simula.1080,
title = {Constructing General Reference Finite Elements},
booktitle = {Automated Solution of Differential Equations by the Finite Element Method},
series = {Lecture Notes in Computational Science and Engineering},
volume = {84},
year = {2012},
pages = {117-128},
publisher = {Springer},
organization = {Springer},
chapter = {4},
isbn = {978-3-642-23098-1},
author = {Robert C. {Kirby} and Mardal, Kent-Andre},
editor = {Logg, Anders and Mardal, Kent-Andre and Garth N. {Wells}}
}