@article{BSL20_3-4_Font_Guzman_Verdu,
author = {Josep M. FONT and Fernando GUZM{\'A}N and Ventura VERD{\'U}},
title = {Characterization of the Reduced Matrices for the $\{\land,\lor\}$-Fragment of Classical Logic},
journal = {Bulletin of the Section of Logic},
volume = {20},
number = {3--4},
year = {1991},
pages = {124--128}
}