1. F. Cagnon, New methodology to help natural gas odorization, in International Gas Union Research Conference, 2011 (International Gas Union, Curran Associates, Inc., 2013)
2. 49 CFR, 192.625, Odorization of gas, Standard in U.S and Canada, 1970
3. G280 (DVGW), Odorization of gas, Standard in Germany, U.K, France, 2008
4. General High-Pressure Gas Safety Regulations (Ministry of International Trade and Industry Ordinance No. 53 of May 25, 1966)
5. IGS-MS-PM (101)-0, Odorization of gas, Standard in Iran, 1996