1. CELSS transportation analysis;Babcock,1985
2. A perspective on CELSS control issues;Blackwell,1990
3. Exploring the limits of crop productivity;Bugbee;Plant Physiol.,1988
4. Controlled environment crop production: hydroponic vs. lunar regolith;Bugbee,1989
5. The limits of crop productivity;Bugbee;BioScience,1992