Höhn, P., Auffermann, G., Ramlau, R., Rosner, H., Schnelle, W., & Kniep, R. (2006). (Ca7N4)[Mx] (M = Ag, Ga, In, Tl): Linear Metal Chains as Guests in a Subnitride Host. Angewandte Chemie - International Edition, 45(40), 6681-6685. doi:10.1002/anie.200601726.