Can multiple Ferrite Beads be used to connect ...?

[commone]

I am designing a board. I splited the ground plane into one analog plane and one digital plane. Can multiple Ferrite Beads be used to connect the both planes or only one FB should be used? In some schematics I see multiple FB are used to connect two planes. Does that violate the rule of single point connection? Acutally, I do not definitely know the true definition of "single point connection".
Can anybody help me to go through this confusion?

Thanks

Leon,
**broken link removed**

 

[som_raparty]

as of i know we need to connect in single point
if we connect in multiple point i think we are forming a ring
which may lead to some emi/emc issues

thnx
som