@article {calo2013gradient,
	title = {Gradient-based estimation of Manning{\textquoteright}s friction coefficient from noisy data},
	journal = {Journal of Computational and Applied Mathematics},
	volume = {238},
	year = {2013},
	pages = {1{\textendash}13},
	publisher = {North-Holland},
	author = {Calo, Victor M and Collier, Nathan and Gehre, Matthias and Jin, Bangti and Radwan, Hany and Santillana, Mauricio}
}
