Wheeler–DeWitt equation and Lie symmetries in Bianchi scalar-field cosmology A. Paliathanasis, L. Karpathopoulos, A. Wojnar and S. Capozziello Eur. Phys. J. C, 76 4 (2016) 225 Published online: 23 April 2016 DOI: 10.1140/epjc/s10052-016-4087-8