Schulman, Lawrence S. Max Planck Institute for the Physics of Complex Systems, Max Planck Society;
http://link.springer.com/article/10.1007/s10701-016-0025-8 (Publisher version)
Schulman, L. S. (2016). Special States Demand a Force for the Observer. Foundations of Physics, 46(11), 1471-1494. doi:10.1007/s10701-016-0025-8.