ROLEČEK, Jan,
Milan CHYTRÝ,
Michal HÁJEK, Samuel LVONČÍK and
Lubomír TICHÝ. Sampling design in large-scale vegetation studies: Do not sacrifice ecological thinking to statistical purism!
Folia Geobotanica. Pruhonice: Institute of Botany, 2007, vol. 42, No 2, p. 199-208. ISSN 1211-9520.