“…This is confirmed by studies in southern Poland (DZWONKO 2011;SKOWRONEK et al 2011;ŚWIERCZ 2011;TOWPASZ, STACHURSKA-SWAKOŃ 2011;WILCZEK et al 2011), south-eastern (CWENER, NOWAK 2011) and central (KIEDRZYŃSKI et al 2011, KUROWSKI et al 2011WOZIWODA, AMBROŻKIEWICZ 2011;WOZIWODA, KOMPERDA 2011;WOZIWODA, MICHALSKA-HEJDUK 2011) as well as north and western regions of Poland (ADAMOWSKI, BOMANOWSKA 2011;RATYŃSKA et al 2011;ZAŁUSKI 2011).…”