VOJTKOVÁ, Mária. Efficiency of industrial activities in SR districts. In Quantitative methods in socio-economic analysis : 19th Slovak-Polish-Ukrainian scientific seminar : abstracts : October 23 - 27, 2012, Svätý Jur. - Bratislava : Vydavateľstvo EKONÓM, 2012. ISBN 978-80-225-3504-5, s. 15.