ΣΑΧΑΝΙΔΗΣ Χ., ΓΕΩΡΓΑΚΟΠΟΥΛΟΣ Α., ΦΙΛΙΠΠΙΔΗΣ Α. and ΚΑΣΩΛΗ-ΦΟΥΡΝΑΡΑΚΗ Α. 2001. Trace element contents in marls of the Ptolemais - Amynteon lignite basin, Western Macedonia, Greece. Bulletin of the Geological Society of Greece. 34, 3 (Jan. 2001), 1115–1122. DOI:https://doi.org/10.12681/bgsg.17171.