1. J.M. Mccall Jr., R.L. Jonhson, Paraffin treatment in the well service industry, Proceedings of the 31st SPE Annual Southwestern Petroleum Short Course, Lubbock, USA, 1984, pp. 457–464.
2. J.A.M. Antunes, Master Degree Thesis, Federal University of Rio de Janeiro, Brazil, 1989 (in Portuguese).