@article{article518326fb,
title   = {A proposal forextending UML-B to support a conceptual model},
author = {Silva, Paulo Sérgio Muniz and Sousa, Thiago C. de and Snook, Colin F.},
year = {2011},
doi = {10.1007/s11334-011-0169-9},
journal   = {Innovations in Systems and Software Engineering}
}