Rüegg, C.; Kiefer, K.; Thielemann, B.; McMorrow, D.F.; Zapf, V.; Normand, B.; Zvonarev, M.B.; Bouillot, P.; Kollath, C.; Giamarchi, T.; Capponi, S.; Poilblanc, D.; Biner, D.; Kramer, K.W.: Thermodynamics of the Spin Luttinger Liquid in a Model Ladder Material. Physical Review Letters 101 (2008), p. 247202
10.1103/PhysRevLett.101.247202