Bolton, Herbert Cairns; Bursill, Leslie Arthur; McLaren, Alexander Clark; Turner, Robin G. (1966). "On the origin of the colour of labradorite". Physica Status Solidi B. 18 (1). ss.221-230. Bibcode:1966PSSBR..18..221B. doi:10.1002/pssb.19660180123.
Bolton, Herbert Cairns; Bursill, Leslie Arthur; McLaren, Alexander Clark; Turner, Robin G. (1966). "On the origin of the colour of labradorite". Physica Status Solidi B. 18 (1). ss.221-230. Bibcode:1966PSSBR..18..221B. doi:10.1002/pssb.19660180123.
Bøggild, Ove Balthasar (1924), "On the Labradorization of the Feldspars"(PDF), Kongelige Danske Videnskabernes Selskab, Mathematisk-fysiske Meddelelelser, 6 (3), ss.1-79, 2 Nisan 2015 tarihinde kaynağından(PDF) arşivlendi
Bøggild, Ove Balthasar (1924), "On the Labradorization of the Feldspars"(PDF), Kongelige Danske Videnskabernes Selskab, Mathematisk-fysiske Meddelelelser, 6 (3), ss.1-79, 2 Nisan 2015 tarihinde kaynağından(PDF) arşivlendi