@article{xu:sj2014, author = {Lauren Samy and Ming-Chun Huang and Jason J. Liu and Wenyao Xu and Majid Sarrafzadeh}, title = {Unobtrusive Sleep Stage Identification Using a Pressure-Sensitive Bed Sheet}, journal = {IEEE Sensors Journal}, volume = {14}, number = {7}, pages = {2092--2101}, month = {July}, year = {2014} }