Borisenko, S. V., Kordyuk, A. A., Legner, S., Kim, T. K., Knupfer, M., Schneider, C. M., et al. (2004). (CaxY1-x)Cu2O8+δCircular dichroism and bilayer splitting in the normal state of underdoped (Pb,Bi)2Sr2 (CaxY1-x)Cu2O8+δ and overdoped (Pb,Bi)2Sr2CaCu2O8+δ. Physical Review B, 69(22): 224509.