@Article{ eatcs04,
author = {Pawe{\l} Soboci{\'{n}}ski},
title = {Process congruences from reaction rules (Luca Aceto's Concurrency Column)},
journal = {Bulletin of the EATCS},
volume = {84},
year = {2004},
url = {https://compose.ee/pawel/papers/colConc84.pdf}
}