@article{BSL20_3-4_Dragalin,
author = {Albert G. DRAGALIN},
title = {The Collapse of the Descriptice Complexity of Truth Definitions of Heyting and Boolean Algebras},
journal = {Bulletin of the Section of Logic},
volume = {20},
number = {3--4},
year = {1991},
pages = {94--95}
}