Massive MIMO SSB mode Physical to logical ports mapping

Hi Experts.
I am unable to find any good material regarding Massive MIMO SSB mode Physical to logical ports mapping (CRS mapping , 4T4R/2T2R)
Can anyone help?

ShareTechNote is the best source:

http://www.sharetechnote.com/html/5G/5G_CSI_RS_Codebook.html

Thanks, can you share for LTE too?

Excellent massive MIMO 5G presentation, white paper, from Samsung: