CEMPÍREK, Jan, Stanislav HOUZAR a
Milan NOVÁK. Complexly zoned niobian titanite from hedenbergite skarn at Písek, Czech Republic, constrained by substitutions Al(Nb,Ta)Ti-2, Al(F,OH)(TiO)-1 and SnTi-1.
Mineralogical Magazine. London: Mineralogical society, 2008, roč. 72, č. 6, s. 1317-1329. ISSN 0026-461X.