El-Said E. S. M.;  Fioretti P. M.;  Roelandt J. R. T. C.;  McNeill A. J.;  Rijsterborgh H.;  Forster Tamás;  Di Mario C.;  Linker D. T.: Dobutamine stress–Doppler echocardiography before and after coronary angioplasty.
  EUROPEAN HEART JOURNAL, 14 (8).  pp. 1011-1021.  ISSN 0195-668X; 1522-9645 (1993)