"Addenda d, j, l, m, and t to ANSI/ASHRAE Standard 34-2004"(PDF). ANSI/ASHRAE Standard 34-2004, Designation and Safety Classification of Refrigerants. Atlanta, GA: American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. 2007-03-03. ISSN1041-2336. Archived from the original(PDF) on 2011-10-12. Retrieved 2011-12-18.
"Addenda d, j, l, m, and t to ANSI/ASHRAE Standard 34-2004"(PDF). ANSI/ASHRAE Standard 34-2004, Designation and Safety Classification of Refrigerants. Atlanta, GA: American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. 2007-03-03. ISSN1041-2336. Archived from the original(PDF) on 2011-10-12. Retrieved 2011-12-18.
"Addenda d, j, l, m, and t to ANSI/ASHRAE Standard 34-2004"(PDF). ANSI/ASHRAE Standard 34-2004, Designation and Safety Classification of Refrigerants. Atlanta, GA: American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. 2007-03-03. ISSN1041-2336. Archived from the original(PDF) on 2011-10-12. Retrieved 2011-12-18.