Gamari-Seale H, Guskos N, Koufoudakis A, Kruk I, Mitros C, Likodimos V, Niarchos N, Psyharis B. A possible new magnetic phase transition in tetragonal RBa2Cu3O6+x (R ? Nd, Sm, Tm). Philosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties [Internet]. 1992;65:1381-1387.