There is a BP2 editor note asking for an OMA Push reference. Here it is:
WAP 2.0 Specifications, Push. 06 November 2002, Open Mobile Alliance™, (See http://www.openmobilealliance.org/Technical/wapindex.aspx)
We don’t need to reference specific specs, as it’s the spec package (“Push”) that is important.
Bryan Sullivan | AT&T