The algorithm for this generator was proposed by Ansótegui et al. in "Towards industrial-like random SAT instances" (IJCAI 2009).
We used this generator for the experiments in "Phase Transitions for Scale-Free SAT Formulas" (AAAI 2017) and "Bounds on the Satisfiability Threshold for Power Law Distributed Random SAT" (ESA 2017).
The code of our implementation can be found here.