@article {helal1980non,
	title = {Non-linear internal waves in shallow water. A theoretical and experimental study},
	journal = {Tellus},
	volume = {32},
	number = {5},
	year = {1980},
	note = {n/a},
	pages = {488{\textendash}504},
	publisher = {Taylor \& Francis},
	abstract = {n/a},
	author = {M. A. Helal and Molines, JM}
}
