@ARTICLE{
author={Astola Helena,Stankovic Radomir S,Astola Jaakko T},
year={2018},
title={Reduction of Variables of Index Generation Functions using Linear and Quadratic Transformations},
journal={JOURNAL OF MULTIPLE-VALUED LOGIC AND SOFT COMPUTING},
volume={31},
number={3},
pages={255-270},
document_type={Article},
} 

@ARTICLE{
author={Stankovic Radomir S,Astola Helena,Astola Jaakko T},
year={2015},
title={Determining Minimized Galois Field Expressions for Ternary Functions by using Special Normal Form},
journal={JOURNAL OF MULTIPLE-VALUED LOGIC AND SOFT COMPUTING},
volume={24},
number={1-4},
pages={53-71},
document_type={Article},
}