INTERNATIONAL JOURNAL OF CARDIOLOGY, cilt.87, sa.2-3, ss.303-305, 2003 (SCI-Expanded)
We establish a criterion for a set of eigenfunctions of the one-dimensional Schr\"{o}dinger operator with distributional potentials and boundary conditions containing the eigenvalue parameter to be a Riesz basis for $\mathscr{L}_2(0,\pi)$.