@article {ettouney2009quick,
	title = {Quick estimation of gas pipeline inventory},
	journal = {Journal of Petroleum Science and Engineering},
	volume = {69},
	number = {1},
	year = {2009},
	note = {n/a},
	pages = {139{\textendash}142},
	publisher = {Elsevier},
	abstract = {n/a},
	author = {R.S. Ettouney and M.A. El-Rifai}
}
