@inbook{Hfner_JKM_14,
author = {H\"ofner, Peter and Jipsen, Peter and Kahl, Wolfram and M\"uller, Martin Eric},
month = may,
year = {2014},
title = {Preface: {R}elational and Algebraic Methods in Computer Science},
volume = {8428},
pages = {2},
booktitle = {Lecture Notes in Computer Science},
isbn = {978-3-319-06251-8}
}