[ntp:questions] Is there a document that describes the recommandation for configuring ntp ?

[Thierry MARTIN]

Hi all,

Many of you kindly answered my previous questions, thanks a lot for that.

Now I realise that I got a lot of "tips", that might be included in a 
"recommandations" doc.

So my quesiton becomes:

Is there a document that describes the recommandation for configuring ntp?

I mean -for instance-, it seems that "everybody" here knows that a 
configuration with only two ntp sources should be avoided; so is there a 
doc where I can find this kind of information?

Regards
Thierry MARTIN