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Kent, Howard: Breathe Better – Feel Better, Quarto Publishing, UK, 1997.

McKeown, P. (2004) Close Your Mouth: Buteyko Breathing Clinic Self Help Manual. Co Galway: Buteyko Books.

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Sabatini, Sandra: Breath, The Essence of Yoga, A Guide to Inner Stillness, Thorsons. 2000.

Saraswati, Swami Ambikananda:  Principles of Breathwork,  Thorsons, London, 1999.

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Speads, Carola:  Ways to Better Breathing,  Healing Arts Press, Rochester, VT, 1992.

Timmons, Beverly H. ed.:  Behavioral and Psychological Approaches to Breathing Disorders, St. Bartholomew’s Hospital, London & Ronald Ley, State University of New York, Albany, USA, Plenum, London,1995.

Zi, Nancy: The Art of Breathing,