Determination of sulfur, nickel and vanadium in fuel and residual oils by X-ray fluorescence spectrometryDENOYER, E. R; SIEGEL, L. A.Analytica chimica acta. 1987, Vol 192, Num 2, pp 361-366, issn 0003-2670Article

Improvement in exercise capacity despite cardiac deterioration-noninvasive assessment of long-term therapy with amrinone in severe heart failureSIEGEL, L. A; IMJEMTEL, T. H; STROM, J et al.The American heart journal. 1983, Vol 106, Num 5, pp 1042-1047, issn 0002-8703Article