. . . . "A definition for time in quantum cosmology"@en . "BF02875295" . . . . "1990" . . . . . . "Abstract. A definition for the intrinsic time co-ordinate is proposed, using the phase of the wave function of the universe. This definition generalizes the notion of time co-ordinate which arises in the semiclassical cosmology. It also leads to acceptable results for the evaluation of expectation values of physical variables."@en . . . . . .