Gmelin handbook of inorganic and organometallic chemistry, eight edition, system number 13 B, boron compounds, fourth supplement, vol. 3a, boron and nitrogen : Edited by J. Faust (Gmelin Institute Frankfurt am Main Germany) and K. Niedenzu (University of Kentucky, Lexington, Kentucky, USA) and Vol. 4, Boron and Cl, Br, I, S, Se, Te, Carboranes Edited by K.-C. Buschbeck (Hanau am Main, Germany) and K. Niedenzu, Springer, Berlin, 1991, xv + 263 pages, DM1390, ISBN 3-540-93635-1 and xx + 322 pages, ISBN 3-540-93629-7