  We obtained accurate resonances for the Stark effect in hydrogen by means of
three independent methods. Two of them are based on complex rotation of the
coordinates and diagonalization of the Hamiltonian matrix (CRLM and CRCH). The
other one is based on the Riccati equations for the logarithmic derivatives of
factors of the wavefunction (RPM). The latter approach enabled us to obtain the
most accurate results and extremely sharp resonances.
