Nath, R., Tsirlin, A. A., Rosner, H., & Geibel, C. (2008). Magnetic properties of BaCdVO(PO4)2: A strongly frustrated spin-1/2 square lattice close to the quantum critical regime. Physical Review B, 78: 064422, pp. 064422-1-064422-7. doi:10.1103/PhysRevB.78.064422.