Gerd Wagner. The Agent-Object-Relationship metamodel: towards a unified view of state and behavior. Inf. Syst., 28(5):475-504, 2003. [doi]
@article{Wagner03:9,
title = {The Agent-Object-Relationship metamodel: towards a unified view of state and behavior},
author = {Gerd Wagner},
year = {2003},
doi = {10.1016/S0306-4379(02)00027-3},
url = {http://dx.doi.org/10.1016/S0306-4379(02)00027-3},
researchr = {https://researchr.org/publication/Wagner03%3A9},
cites = {0},
citedby = {0},
journal = {Inf. Syst.},
volume = {28},
number = {5},
pages = {475-504},
}