1. “Lead-mercury based superconductors: the 1212 cuprate Pb0.7Hg0.3Sr2+xCa0.7Nd0.3-xCu2O7- and the new oxycarbonate Pb0.7Hg0.3Sr4Cu2CO3O7”. Martin C, Hervieu M, Huvé M, Michel C, Maignan A, Van Tendeloo G, Raveau B, Physica C-Superconductivity And Its Applications 222, 19 (1994)