Behm D, Colado JC.
The effectiveness of resistance training using unstable surfaces and devices for rehabilitation.
Int J Sports Phys Ther. 2012 Apr;7(2):226-41. PDF
Colado JC, Garcia-Masso X, Triplett TN, Flandez J, Borreani S, Tella V.
Concurrent Validation of the OMNI-Resistance Exercise Scale of Perceived Exertion With Thera-Band Resistance Bands.
J Strength Cond Res. 2012 Nov;26(11):3018-24. PDF