Cirac, J. Ignacio Theory, Max Planck Institute of Quantum Optics, Max Planck Society;
Verstraete, Frank Theory, Max Planck Institute of Quantum Optics, Max Planck Society;
Cirac, J. I., & Verstraete, F. (2009). Renormalization and tensor product states in spin chains and lattices. Journal of Physics A - Mathematical and Theoretical, 42(50): 504004. doi:10.1088/1751-8113/42/50/504004.