pekny, fyzikalno-jazykovy, ktory priamo suvisi s nasim vyskumom :-) http://1.bp.blogspot.com/-PAUVgUM45kw/TWUtj0sqv1I/AAAAAAAAC1s/9cMpL0fTH24/s1600/Rich%2BTennant%2Bsample%2B3.jpg