@online{wikilc,
	journal = {English Wikipedia},
	year = {2021},
	title = {Load cell},
	url = {https://w.wiki/3Cmt},
	urldate = {2021-04-18}
}
@online{acwr,
	journal = {Air Command Water Rockets},
	year = {2011},
	title = {Measuring bottle stretch thrust},
	url = {http://aircommandrockets.com/day106.htm},
	urldate = {2021-04-18}
}
@online{eqs,
	journal = {ScienceBits},
	title = {Water Propelled Rocket},
	url = {http://www.sciencebits.com/RocketEqs},
	urldate = {2021-04-18}
}
@online{calc,
	journal = {Nablu},
	title = {The water rocket: Numerical calculations},
	url = {https://www.nablu.com/2017/07/the-water-numerical-calculations.html},
	author = {Alex Matulich},
	urldate = {2021-04-18},
	year = {2017}
}
@online{tracker,
	title = {Domača stran programa Tracker},
	journal = {Physlets},
	year = {2021},
	urldate = {2021-04-18},
	url = {https://tracker.physlets.org/}
}