ASCE produce a design guide for hybrid coupled walls that contains good information on this type of system.

https://ascelibrary.org/doi/pdf/10.1061/40944%2824...

I would note though the mechanism by which they transfer loads to the wall is more of a vertical force bearing couple at the wall face and end of the beam. The studs don't really transfer loads in these arrangements, more just to hold the beam in the concrete wall and hold the concrete to the beam. All covered by the guide linked to though.

Thank you verymuch

Those recommendations are for wide flange links.

OP is correct that shear studs are used (and required) for plate reinforced coupling beams. Article on those types of links is here: https://ascelibrary.org/doi/abs/10.1061/%28ASCE%290733-9445%282005%29131%3A8%281294%29.

Info in a previous thread below may be of assistance too:

Link