Gunther Schmidt. Relational Mathematics. Volume 132 of Encyclopedia of Mathematics and its Applications, Cambridge University Press, 2011. [doi]
@book{Schmidt2011,
title = {Relational Mathematics},
author = {Gunther Schmidt},
year = {2011},
url = {http://www.cambridge.org/de/knowledge/isbn/item2713741/},
researchr = {https://researchr.org/publication/Schmidt2011},
cites = {0},
citedby = {0},
volume = {132},
series = {Encyclopedia of Mathematics and its Applications},
publisher = {Cambridge University Press},
isbn = {978-0-521-76268-7},
}