= Model of Petrov et al. = == References == || ![1] || [[http://dx.doi.org/10.1007/s100520100838|PETROV, V. A. and PROKUDIN, A. V., Eur. Phys. J., C23 (2002) 135-143]] || == Implementation notes == Implemented in class `PPPModel` (see in [[http://elegent.hepforge.org/doxygen/classElegent_1_1PPPModel.html|Doxygen]]).