Richardson MJ, Marsh KL, Isenhower RW, Goodman JRL, Schmidt RC. Rocking together: Dynamics of intentional and unintentional interpersonal coordination. Human Movement Science [Internet]. 2007;26(6):867 - 891. http://linkinghub.elsevier.com/retrieve/pii/S0167945707000528

Schmidt RC, O'Brien B. Evaluating the Dynamics of Unintended Interpersonal Coordination. Ecological Psychology [Internet]. 1997;9(3):189 - 206. http://www.tandfonline.com/doi/abs/10.1207/s15326969eco0903_2