@inproceedings {siu2008redesign,
	title = {Redesign of the rollator{\textquoteright}s (walker{\textquoteright}s) parking brake system},
	booktitle = {Proceedings of the Fourth IASTED International Conference},
	volume = {619},
	number = {003},
	year = {2008},
	pages = {129},
	author = {Siu, Stephen and Wong, Maria and Shah, Aditya and Li, Heng and Soong, Alan and Cao, Ray and Pino, Lou and Zelek, John}
}
