@article{DBLP:journals/logcom/Grahne98,
author = {G{\"o}sta Grahne},
title = {Updates and Counterfactuals},
journal = {J. Log. Comput.},
volume = {8},
number = {1},
year = {1998},
pages = {87-117},
ee = {http://dx.doi.org/10.1093/logcom/8.1.87},
bibsource = {DBLP, http://dblp.uni-trier.de}
}