Authors
Joanna Rymarczyk
Tele and Radio Research Institute, Ratuszowa 11, 03-450, Warsaw, Poland
Elżbieta Czerwosz
Tele and Radio Research Institute, Ratuszowa 11, 03-450, Warsaw, Poland
Ryszard Diduszko
Tele and Radio Research Institute, Ratuszowa 11, 03-450, Warsaw, Poland
Mirosław Kozłowski
Tele and Radio Research Institute, Ratuszowa 11, 03-450, Warsaw, Poland