(\km p \opl\ \kp \ap) correlation functions obtained in pp collisions at \onethree. The measured data points are taken from~ and have been corrected for finite experimental momentum resolution and for residual correlations as described in Section~\ref{sec:ck_exp}. Measured data are shown by the black markers, the vertical error bars and the boxes represent the statistical and systematic uncertainties, respectively. The red and blue bands in the upper panels represents the model calculations and its systematic uncertainty as described in the text. The $r_\mathrm{core}$ and $r_{\rm eff}$ values of the source are reported with their statistical and systematical uncertainties. Bottom panels represent the data-to-model comparison as described in the text.