number={13},
year={1976},
}
+
+@article{niiyama1980,
+ author={Hiroo Niiyama and Kazuhisa Murata and H.V. Can and Etsuro Echigoya},
+ title={Role of surface oxygen in the reaction of NO with NH3 over chromia catalyst},
+ journal={Journal of Catalysis},
+ volume={63},
+ number={1},
+ year={1980},
+ pages={1-10},
+ issn={0021-9517},
+ doi={10.1016/0021-9517(80)90055-X},
+}
+
+@article{curryhyde1992,
+ author={H.E. Curry-Hyde and Hans Musch and A. Baiker and M. Schraml-Marth and A. Wokaun},
+ title={Surface structure of crystalline and amorphous chromia catalysts for the selective catalytic reduction of nitric oxide I. Characterization by temperature-programmed reaction and desorption},
+ journal={Journal of Catalysis},
+ volume={133},
+ number={2},
+ year={1992},
+ pages={397-414},
+ issn={0021-9517},
+ doi={10.1016/0021-9517(92)90249-H},
+}