Actually i find it bymyself and in our standarts we have two kind of Flux:
- Flux = magnetic density / the area that the flux cross == Ф=B/S;
- flow coupling (this word is from google translate!) = Flux * number of turns == Ѱ = Ф * N
You say that 2. is = to Flux :) but in our standart is flow coupling(the maximum flux that one winding can make!)