@article {Simula.SC.282,
	title = {Efficient Assembly of H(div) and H(curl) Conforming Finite Elements},
	journal = {SIAM Journal on Scientific Computing},
	volume = {36},
	number = {6},
	year = {2009},
	pages = {4130-4151},
	author = {Marie E. {Rognes} and Robert C. {Kirby} and Logg, Anders}
}
