Xiaozhai Tiankeng (Italian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Xiaozhai Tiankeng" in Italian language version.

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doi.org

Dina Fine Maron, What causes a sinkhole to form?, in National Geographic. URL consultato il 10 aprile 2024.

Xuewen Zhu e Tony Waltham, Tiankeng: Definition and description (PDF), in Cave and Karst Science, vol. 32, 2 & 3, British Cave Research Association, 2005, pp. 75-79. URL consultato il 9 aprile 2024.
Wang Yinghui et al., Compositional fractionation of polyaromatic hydrocarbons in the karst soils, South China (PDF), in Environmental Earth Sciences, vol. 66, n. 7, agosto 2011, pp. 2013-2019, DOI:10.1007/s12665-011-1426-9. URL consultato il 9 aprile 2024.

Jason Berenyi, Collapse Tiankengs (PDF), in Stratigraphic investigations into the genesis of anomalously thick coal deposits in East-Central Saskatchewan, Università di Regina, pp. 93. URL consultato il 10 aprile 2024.

Ged Campion e Tony Harrison, China Caves Project (PDF), in YRC Journal, The Yorkshire Ramblers' Club. URL consultato il 19 aprile 2024.