Sunjoo Hong Kiseok Song Long Yan Hoi-Jun Yoo A combined method to reduce motion artifact and power line interference for wearable healthcare systems. 508-511 2010 APCCAS https://doi.org/10.1109/APCCAS.2010.5775062 conf/apccas/2010 db/conf/apccas/apccas2010.html#HongSYY10