@InProceedings{KP01,
author={Sébastien  Konieczny and Ramón  Pino Pérez},
title= {Some operators for iterated revision},
booktitle = {Sixth European Conference on Symbolic and Quantitative Approaches to Reasoning with Uncertainty (ECSQARU'01)} ,
pages = {498-509},
year= {2001}
}