by Sergey Goncharov and Lutz Schröder
Reference:
Sergey Goncharov and Lutz Schröder: A Counterexample to Tensorability of Effects, In Andrea Corradini, Bartek Klin, eds.: Algebra and Coalgebra in Computer Science (CALCO 2011), Lecture Notes in Computer Science, vol. 6859, pp. 208–221, Springer, 2011. [preprint]
Bibtex Entry:
@InProceedings{GoncharovSchroder11,
author = {Sergey Goncharov and Lutz Schr{\"o}der},
title = {A Counterexample to Tensorability of Effects},
year = {2011},
editor = {Andrea Corradini and Bartek Klin},
booktitle = {Algebra and Coalgebra in Computer Science (CALCO 2011)},
publisher = {Springer},
series = {Lecture Notes in Computer Science},
comment = { <a href = "http://www.informatik.uni-bremen.de/~sergey/tensor.pdf"> [preprint] </a>},
volume = {6859},
pages = {208-221},
}