"Pattern of karst landscape of the Cracow Upland (South Poland)" by Witold Stefan Alexandrowicz and Zofia Alexandrowicz, Acta Carsologica, Slovenian Academy Of Sciences "Acta Carsologica". Archived from the original on 2007-09-26. Retrieved 2007-09-12.
"Pattern of karst landscape of the Cracow Upland (South Poland)" by Witold Stefan Alexandrowicz and Zofia Alexandrowicz, Acta Carsologica, Slovenian Academy Of Sciences "Acta Carsologica". Archived from the original on 2007-09-26. Retrieved 2007-09-12.