E. M. C. Alayon, M. Nachtegaal, M. Ranocchiari, and J. A. van Bokhoven, “Catalytic Conversion of Methane to Methanol Using Cu-Zeolites”, Chimia, vol. 66, no. 9, p. 668, Sep. 2012, doi: 10.2533/chimia.2012.668.