[1]
BlazhkoL.M., ZhadanT.O. and SerovN.I. 2006. Classification of linear representations of the Galilei, Poincaré, and conformal algebras in the case of a two-dimensional vector field and their applications. Ukrains’kyi Matematychnyi Zhurnal. 58, 8 (Aug. 2006), 1128–1145.