1. Anderson, E.: New interpretation of variational principles for gauge theories. I. Cyclic coordinate alternative to ADM split. Class. Quantum Gravity 25, 175011 (2008). arXiv:0711.0288
2. Anderson, E.: Problem of time: facets and machian strategy. Ann. N.Y. Acad. Sci. 1326, 42 (2014). arXiv:1306.5816
3. Anderson, E.: The problem of time and quantum cosmology in the relational particle mechanics arena. arXiv:1111.1472
4. Anderson, E.: Machian time is to be abstracted from what change? arXiv:1209.1266
5. Baierlein, R.F., Sharp, D.H., Wheeler, J.A.: Three-dimensional geometry as carrier of information about time. Phys. Rev. 126, 1864 (1962)