  The paper is devoted to the study of stability of equilibrium solutions of a
delay differential equation that models leukemia. The equation was previously
studied in [5] and [6], where the emphasis is put on the numerical study of
periodic solutions. Some stability results for the equilibria are also
presented in these works, but they are incomplete and contain some errors. Our
work aims to complete and to bring corrections to those results. Both Lyapunov
first order approximation method and second Lyapunov method are used.
