Source: MIT Open Access Articles. Alexander H. Slocum , Maha N. Haji, A. Zachary Trimble , Marco Ferrara, Sasan J. Ghaemsaidi, Department of Mechanical Engineering, Massachusetts Institute of Technology. Dec 26, 2016.
Link to original IPHROS paper by MIT. http://www.sciencedirect.com/science/article/pii/S2213138816300492
