8Alexander S. Komarov. The Civil Code of the Russian Federation: General Provisions on Liability for the Violation of Obligations. McGill Law Journal [J]. 1999, (44): 357, 365, 365, 366.
9A. Berger. Encyclopedic Dictionary of Roman Law 634. 1953.
10From Michael Mossy Christovich and Thomas J. R. Stadnik, Judicial Modification of Penal Clauses-A Survey of Recent Developments. 53 Tul. L. Rev. 1979. 523.
