Vladimir Modrak, Peter Knuth and Jozef Novak-Marcinein
International Business Management 4 ( 1 ): 28 - 34 , 2010
Pavol Semanco, Vladimir Modrak, R. Sudhakara Pandian and Peter Knuth
Journal of Engineering and Applied Sciences 6 ( 2 ): 122 - 126 , 2011
Vladimir Modrak and Peter Knuth
Research Journal of Applied Sciences 7 ( 1 ): 21 - 28 , 2012