@article{DBLP:journals/jcss/MasunagaNO76,
author = {Yoshifumi Masunaga and
Shoichi Noguchi and
Juro Oizumi},
title = {A Characterization of Automata and a Direct Product Decomposition},
journal = {J. Comput. Syst. Sci.},
volume = {13},
number = {1},
year = {1976},
pages = {74-89},
ee = {http://dx.doi.org/10.1016/S0022-0000(76)80052-9},
bibsource = {DBLP, http://dblp.uni-trier.de}
}