@article{SIGMA_2006_2_a49,
     author = {Benedetto Militello and Paolo Aniello and Antonino Messina},
     title = {Perturbative {Treatment} of the {Evolution} {Operator} {Associated} with {Raman} {Couplings}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2006},
     volume = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2006_2_a49/}
}