@article { kevinou12, title = {Microspheres as Resistive Elements in a Check Valve for Low Pressure and Low Flow Rate Conditions}, journal = {Lab on a Chip}, volume = {12}, number = {21}, year = {2012}, pages = {4372-4380}, type = {article}, author = { Ou, K. and Jackson, J. and Burt, H. and Chiao, M. } }