  We present refits of single inclusive cross section data of mesons and
baryons for central 158 $AGeV$ Pb+Pb collisions measured by the NA44 and NA49
Collaborations. In the theoretical approach we use the relativistic
hydrodynamical code HYLANDER-C. We investigate several equations of state in
their capability to describe the measured single inclusive momentum
distributions. Based on the obtained fits we present results of the calculated
Bose-Einstein correlation functions of identical pion pairs and discuss their
features in comparison to measurements.
