Szukana fraza: [Abstract = "The model analyzed in this paper is based on the model set forth by V.A. Kuznetsov and M.A. Taylor, which describes a competition between the tumor and immune cells. Kuznetsov and Taylor assumed that tumor\-immune interactions can be described by a Michaelis\-Menten function. In the present paper a simplified version of the Kuznetsov\-Taylor model \(where immune reactions are described by a bilinear term\) is studied. On the other hand, the effect of time delay is taken into account in order to achieve a better compatibility with reality."]