Continued increase of CFC-113a (CCl3CF3) mixing ratios in the global atmosphere: Emissions, occurrence and potential sources by Adcock, Karina E., Reeves, Claire E., Gooch, Lauren J., Leedham Elvidge, Emma C., Ashfold, Matthew J., Brenninkmeijer, Carl A.M., Chou, Charles, Fraser, Paul J., Langenfelds, Ray L., Mohd Hanif, Norfazrin, O'Doherty, Simon, Oram, David E., Ou-Yang, Chang-Feng, Phang, Siew Moi, Samah, Azizan Abu, Röckmann, Thomas, Sturges, William T., Laube, Johannes C.