@article {214658,
	title = {Experimental and statistical study for measurements of surface roughness and hole geometry of ultrasonic-assisted drilling of soda glass},
	journal = {Journal of the Brazilian Society of Mechanical Sciences and Engineering},
	volume = {43},
	year = {2021},
	pages = {2-11},
	author = {Abdallah Abdelkawy and Hassan El-Hofy}
}
