Quasiprobability distribution functions for periodic phase-spaces: I.   Theoretical Aspects
  An approach featuring $s$-parametrized quasiprobability distribution functions is developed for situations where a circular topology is observed. For such an approach, a suitable set of angle-angular momentum coherent states must be constructed in appropriate fashion. 
M. Ruzzi, M. A. Marchiolli, E.C. Silva, D. Galetti