VIGOUROUX, Christian <br/><br/>
Les abonnées du téléphone et les PTT 

 - Paris :  IIAP,  janv./mars 1988 
<br/><br/> Cryptic billing, threats of cut-off, burden of proof on users and restricted access to PTT corridors of power all make users feel powerless in the face of overbilling. The PTT are adopting modern technology to provide users with new services that will prevent complaints, or handle them more efficiently, this alleviating the current state of affairs