Bargiel, Marianne. “Lullabies and Play Songs: Theoretical Considerations for an Early Attachment Music Therapy Intervention through Parental Singing for Developmentally At-Risk Infants”. Voices: A World Forum for Music Therapy 4, no. 1 (March 1, 2004). Accessed December 6, 2025. https://voices.no/index.php/voices/article/view/1650.