Open access to charging functions in multimedia networks. - Ivaylo Ivanov Atanasov; Evelina Nikolova Pencheva; Dora Atanasova Marinska (EUROCON, 2011)

Parlay X Web Services for Policy and Charging Control in Multimedia Networks. - Ivaylo Atanasov; Evelina Pencheva; Dora Atanasova Marinska (Adv. Multim., 2012)