Lukić, T., S. B. Marković, T. Stevens, D. A. Vasiljević, B. Machalett, N. Milojković, B. Basarin, and I. Obreht. “The Loess ‘Cave’ Near the Village of Surduk - an Unusual Pseudokarst Landform in the Loess of Vojvodina, Serbia”. Acta Carsologica, vol. 38, no. 2-3, Dec. 2009, doi:10.3986/ac.v38i2-3.124.