  We studied recent observation data of pulsar masses and radii of PSR
J0740$+$6620, PSR J0348$+$0432, and PSR J1614$-$2230 from different
measurements, based on the extended version of $\sigma $-$ \omega$ model.
Throughout our analysis, we assumed that these pulsars are maximal-mass compact
stars, thus we applied the core approximation. Based on the linear relation
between the microscopic and macroscopic parameters of compact stars evaluated
by our model, we estimated the average Landau mass $m_L =
752.46^{+49.1}_{-42.5}$ MeV and compressibility $K = 261.7^{+57.2}_{-28.0}$
MeV.
