TY  - BOOK
AU  - Cupillari, Antonela
AU  - Cupillari, Antonella
TI  - The nuts and bolts of proofs : an introduction to mathematical proofs (4th edition)
SN  - 9780123822178
AV  - QA 9.54 Cup 
PY  - 2013///
CY  - Amsterdam ; Boston
PB  - Elsevier Academic Press
KW  - PROOF THEORY
N1  - Includes bibliographical references (p. 278-280) and index
ER  -