1. Hanuza, J., Andruszkiewcz, A., Bukowski, Z., et al., Vibrational spectra and internal phonon calculations for the M2Cu2O5 binary oxides (M = In, Sc, Y, or from Tb to Lu), Spectrochim. Acta., Part A, 1990, vol. 46, no. 5, pp. 691–704.
2. Janicki, J. and Troć, R., Quasi-one-dimensional magnetic properties of the (In; Sc; Lu; Y)2Cu2O5 oxides, J. Phys.: Condens. Matter, 1992, vol. 4, pp. 6267–6274.
3. Moshchalkov, V.V., Samarin, N.A., Zoubkova, Y., and Mill, B.V., Low temperature heat capacity of R2Cu2O5 (R = Y, Tb, Dy, Ho, Er, Tm, Yb, Lu) compounds, Phys. B, 1990, vol. 163, pp. 237–238.
4. Arsen’ev, P.A., Kovba, L.M., Bagdasarov, Kh.S., et al., Soedineniya redkozemel’nykh elementov. Sistemy s oksidami elementov I–III grupp (Rare-Earth Compounds: Systems with Group I-III Oxides), Moscow: Nauka, 1983.
5. Troc-, R., Klamut, J. Bukowski, Z., et al., On the magnetic ordering in the R2Cu2O5 systems, Phys. B, 1989, vol. 154, pp. 189–196.