TY  - BOOK
AU  - Embley, David W. 
AU  -  Thalheim, Bernhard 
TI  - Handbook of conceptual modeling : theory, practice, and research challenges
SN  - 9783642158643
U1  - 005.1 
PY  - 2011///
CY  - Berlin
PB  - Springer
ER  -