Cavadini, N; Henggeler, W; Furrer, A; Güdel, Hans-Ulrich; Krämer, Karl; Mutka, H (2000). Magnetic excitations and spin gap in KCuCl3. Physica B-Condensed Matter, 276-278, pp. 540-542. Elsevier 10.1016/S0921-4526(99)01747-0