Interactions of lanthanide atoms: Comparative ab initio study of YbHe, Yb 2 and TmHe, TmYb potentialsA. A. Buchachenko, G. Chałasiński and M. M. SzczęśniakEur. Phys. J. D, 45 1 (2007) 147-153DOI: https://doi.org/10.1140/epjd/e2006-00263-3