Sörensen´s PBS ???

[Thorsten Schmidt]

Dear reader!

I use Sörensen´s PBS containing
0,08 M Na2HPO4
0,02 M NaH2PO4
0,15 M NaCl
pH 7,4

This buffer is widely used for in situ and histological staining.

I need now for a publication the exact reference for this buffer!
In which paper was this buffer published for the first time?

Can you help me?

Thank you very much in advance for your answer!

Thorsten Schmidt