@article {deHaro:2006ymc,
	title = {Conformally Coupled Scalars, Instantons and Vacuum Instability in AdS<sub>4</sub>},
	journal = {Phys. Rev. Lett.},
	volume = {98},
	year = {2007},
	pages = {231601},
	doi = {10.1103/PhysRevLett.98.231601},
	author = {de Haro, Sebastian and Papadimitriou, Ioannis and Petkou, Anastasios C.}
}
