X-ray preselected candidates, @Mamaj02 carried out spectroscopic observations and characterized 110 pre-main-sequence stars as UCL and LCC members with 41 of them in the Crux Cone. All but two stars are classified as young by us also, and 30 of them are members in CMG. @2012ApJ...746..154P investigated the 138 F-type members of the @1999AJ....117..354D sample. Out of the 48 of their stars in our BS, 42 are young and 28 are in CMG.

@2012AJ....144....8S spectroscopically identified 104 and M-type members of the Scorpius-Centaurus complex based on X-ray and kinematically pre-selected samples. They confirmed the youth of these stars by comparing Li $\lambda$6708 absorption line strengths against those of stars in the TW Hydrae association and the $\beta$ Pictoris moving group. From their 57 members in the Crux Cone, 53 are in our BS, all of them are young, and 48 of them are members in CMG.

@2016MNRAS.461..794P undertook a spectroscopic survey to search for new K- and M-type members of Scorpius-Centaurus. They obtained a sample of 493 solar-mass ($\approx$ 0.7-1.3 M$_\odot$) stars, out of which 156 were previously unknown. Of their 493 members 120 are in the Crux Cone, 116 are young and 95 are members in our CMG.

Finally 