1. The distribution of residence times in a falling water film;Asbjornsen;Chem. Eng. Sci.,1961
2. Reaction invariants in the control of chemical reactors;Asbjornsen;Chem. Eng. Sci.,1972
3. Reaction invariants in chemical reactor dynamics;Asbjornsen;Kem. Teoll.,1972
4. Modeling techniques: theory and practice;Asbjornsen;Model. Identification Control,1986