The Oxford dictionary of the Middle Ages

FROLÍK, J. Margravate of Moravia; Pottery, ceramics, and tile: "Prague Style" ceramics; Prague Castle. In: BJORK, R. E., ed. The Oxford dictionary of the Middle Ages. Oxford: Oxford University Press, 2010, 1087,1350-51,1353-54. ISBN 978-0-19-866262-4.