@book{81282,
	author = {Omar Khaled Mohammed Bakr and Mohammed Nassar , },
	title = {Vibration analysis of tapered timoshenko beams and euler-bernoulli beamsresting on an elastic foundationdue to axial and moving loads / },
	publisher = {Omar Khaled Mohammed Bakr , },
	year = {2021},
	address = {Cairo : },
	url = {http://172.23.153.220/th.pdf}
}