Michael Köhler-Bußmeier and Frank Heitmann.
Conservative elementary object systems.
Fundamenta Informaticae, 120(3-4):325-339, 2012.
@article{Koehler+12, author = {K{\"o}hler-Bu{\ss}meier, Michael and Heitmann, Frank}, title = {Conservative Elementary Object Systems}, journal = "Fundamenta Informaticae", volume = {120}, number = {3-4}, pages = {325-339}, year = 2012 }