@ARTICLE{
author={Pantovic Jovanka B,Tosic Ratko D,Vojvodic Gradimir D},
year={2001},
title={Relative completeness with respect to two unary functions},
journal={DISCRETE APPLIED MATHEMATICS},
volume={113},
number={2-3},
pages={337-342},
document_type={Article},
} 

@ARTICLE{
author={Ngom A,Stojmenovic Ivan,Tosic Ratko D},
year={2001},
title={The computing capacity of three-input multiple-valued one-threshold perceptrons},
journal={NEURAL PROCESSING LETTERS},
volume={14},
number={2},
pages={141-155},
document_type={Article},
}