[Proj] How to acknowledge support from the community/list?

[Luigi Ponti]

Dear list,

I really appreciated your support, see:
http://osgeo-org.1803224.n2.nabble.com/Standard-projection-for-Mediterranean-basin-tp4567082p4567082.html

and would like to know if there is a standard way to acknowledge that 
when writing a paper.

I have not found this info on:
http://trac.osgeo.org/proj/

and by the way I could not download the manual at:
ftp://ftp.remotesensing.org/proj/OF90-284.pdf

Kind regards,

Luigi