Sachanbiński, M., Kóčka-Krenz, H., Skoczylas, J., & Girulski, R. (2014). Gemstones from the ducal part of the fortified settlement of Poznań (10th/11th century) in the light of gemological studies and micro-Raman spectroscopy. Slavia Antiqua. Rocznik poświęcony starożytnościom słowiańskim, (55), 145–169. https://doi.org/10.14746/sa2014LV.4