N. Meissner, E. A. Perseil, J. Brugger, P. J. Chiappero: Strontiomelane, SrMn (super 4+) 6 Mn (super 3+) 2 O 16 , a new mineral species of the cryptomelane group from St. Marcel-Praborna, Aosta Valley, Italy In: Canadian Mineralogist, Vol. 37, Part 3, 1999, S. 673–678 (PDF, englisch)