Elving, G. J. (2002). Voice prosthetic valve failure due to biofilm formation. Rijksuniversiteit te Groningen.
Lua i Stíl Chicago (17ú heag.)Elving, G. J. Voice Prosthetic Valve Failure Due to Biofilm Formation. Netherlands: Rijksuniversiteit te Groningen, 2002.
Lua MLA (8ú heag.)Elving, G. J. Voice Prosthetic Valve Failure Due to Biofilm Formation. Rijksuniversiteit te Groningen, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.