Buffington, A. F., A. Weiland, J. Arnold, and D. Arbogast. “What Is Your ‘Phytolith Load’? An Examination of the Potential for Cross-Contamination During Phytolith Extraction”. Ethnobiology Letters, Vol. 9, no. 2, Apr. 2018, pp. 65-74, doi:10.14237/ebl.9.2.2018.955.