K. Schlenga, G. Hechtfischer, R. Kleiner, W. Walkenhorst, P. Müller, H. L. Johnson, M. Veith, W. Brodkorb, E. Steinbeiss,
Subgap Structures in Intrinsic Josephson Junctions of Tl2Ba2Ca2Cu3O10+ delta and Bi2Sr2CaCu2O8+ delta. Physical Review Letters. ,vol. 76, pp. 4943- 4946 ,(1996) ,
10.1103/PHYSREVLETT.76.4943