Contains the keyword Gravity

Girelli F, Poulin D. Quantum reference frames and deformed symmetries. Phys. Rev. D. 2008;77:104012. Abstract
Girelli F, Poulin D. Deformed symmetries from quantum relational observables. In: J. of Phys.: Conf. Series, 12th Conference on Recent Developments in Gravity. Vol 68.; 2007. Abstract
Milburn GJ, Poulin D. Relational time for systems of oscillators. Int. J. Quant. Info.. 2006;4:151. Abstract
Poulin D. Toy model for a relational formulation of quantum theory. Int. J. of Theor. Phys.. 2006;45:1229. Abstract