Bicak, Jiri AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
Bicak, J., Katz, J., & Lynden-Bell, D. (2007). Cosmological perturbation theory, instantaneous gauges, and local inertial frames. Physical Review D, 76(6): 063501. Retrieved from http://link.aps.org/abstract/PRD/v76/e063501.