@article{BSL4_4_Graczynska_Wronski1,
author = {Ewa GRACZY{\'N}SKA and Andrzej WRO{\'N}SKI},
title = {On Normal Agassiz Systems of Algebras},
journal = {Bulletin of the Section of Logic},
volume = {4},
number = {4},
year = {1975},
pages = {143--149}
}