TY - RPRT TI - Comment on "Fermi surface, ground-state electronic structure, and positron experiments in YBa2Cu3O7" AU - von Stetten EC AU - S Berko PY - 1990 DO - 10.1103/physrevlett.65.135 UR - https://pubmed.ncbi.nlm.nih.gov/10042191/ ID - 10042191 ER -