Mortensen, L.M.  1984a.  Photosynthetic adaptionin CO2 enriched air and the effect of intermittent CO2 application on greenhouse plants.  Acta Horticulturae 162: 153-158.

Mortensen, L.M.  1984b.  The effect of nitrogen oxides (NOx) during CO2 enrichment on some greenhouse plants.  Acta Horticulturae 162: 285-287.

Mortensen, L.M.  1985.  Nitrogen oxides produced during CO2 enrichment. I. Effects on different greenhouse plants.  New Phytologist 101: 103-108.

Mortensen, L.M.  1986.  Effect of intermittent as compared to continuous CO2 enrichment on growth and flowering of Chrysanthemum x morifolium Ramat. and Saintpaulia ionantha H. Wendl.  Scientia Horticulturae 29: 283-289.