@article{BSL7_2_Lopes_Dos_Santos,
author = {Luis Henrique {LOPES DOS SANTOS}},
title = {Discussive Versions of the Modal Calculi $T$, $B$, $S4$ and $S5$},
journal = {Bulletin of the Section of Logic},
volume = {7},
number = {2},
year = {1978},
pages = {92}
}