@InBook{BJKP98,
author={Hassan  Bezzazi and Stéphane  Janot and Sébastien  Konieczny and Ramón  Pino Pérez},
title= {Analysing rational properties of change operators based on forward chaining},
booktitle = {Transaction and Change in Logic Databases} ,
publisher= {SpringerLNCS 1472 },
pages= {317-339}
year= {1998}
}