1. Ethics: a lost dimension in soft systems practice;Atkinson;J. Appl. Syst. Anal.,1989
2. Steps to an ecology of mind;Bateson,1971
3. Towards action researching systems;Bawden,1989
4. Of agricultural systems and systems agriculture;Bawden,1990
5. The purposes of field-crop ecosystems: social and economic aspects. Field crop ecosystems of the world;Bawden,1990