Dm. Gitman et Al. Shelepin, POINCARE GROUP AND RELATIVISTIC WAVE-EQUATIONS IN 2-DIMENSIONS(1), Journal of physics. A, mathematical and general, 30(17), 1997, pp. 6093-6121
Using the generalized regular representation, an explicit construction
of the:unitary irreducible representations of the (2 + 1)-Poincare gr
oup is presented. A detailed description of the angular momentum and s
pin in 2 + 1 dimensions is given. On this base the relativistic wave e
quations for all spins (including fractional) are constructed.