Coherent-state path integrals in the continuum: The SU(2) case
  We define the time-continuous spin coherent-state path integral in a way that is free from inconsistencies. The proposed definition is used to reproduce known exact results. Such a formalism opens new possibilities for applying approximations with improved accuracy and can be proven useful in a great variety of problems where spin Hamiltonians are used. 
G. Kordas, D. Kalantzis and A.I. Karanikas
cond-mat.other quant-ph