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Lines and Geoglyphs of Nasca and Palpa - UNESCO World Heritage Centre, https://whc.unesco.org/en/list/700
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(PDF) The Geoglyphs of Palpa, Peru: Documentation, Analysis, and Interpretation | Karsten Lambers - Academia.edu, https://www.academia.edu/1592483/The_Geoglyphs_of_Palpa_Peru_Documentation_Analysis_and_Interpretation
Geosciences | Free Full-Text | High Resolution Drone Surveying of the Pista Geoglyph in Palpa, Peru (mdpi.com), https://www.mdpi.com/2076-3263/8/12/479
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