HAVIAR, Miroslav. Grätzer, G.; Schmidt, E. T.: On isotone functions with the substitution property in distributive lattices. In MathSciNet : Mathematical Reviews on the web. 1. vyd. - Providence : American Mathematical Society, 1996. ISSN 2167-5163, 96k:08005, online, mR1361610, pp. [1-2]. Recenzia na: On isotone functions with the substitution property in distributive lattices / G. Grätzer, E. T. Schmidt. - [Heidelberg] : Springer Netherlands, 1995.