Bygren LO, Konlaan BB, Johansson SEAttendance at cultural events, reading books or periodicals, and making music or singing in a choir is determinants for survival: Swedish interview survey of living conditions. BMJ1996; 313 (21 Dec): 1577—80.
2.
Buchholz I.Breathing, voice, and movemet therapy: applications to breathing disorders . Biofeedback-Self-Regul. 1994; 19: 141—53.
3.
Newham P.The singing cure: An introduction to voice movement therapy. Shambhala Publications. Boston, USA. 1994.