易筋經; Wade-Giles: I Chin Ching; literally “Muscle Tendon Change Classic”

Litterature:
Yi Jin Jing: Tendon – Muscle Strengthening Qigong Exercises (Chinese Health Qigong Associat)
Foreign Language Press
ISBN 9787119047782

Qigong, the Secret of Youth: Da Mo’s Muscle/tendon and Marrow/brain Washing Classics
by Yang Jwing-Ming and Jwing-Ming Yang
ISBN 1886969841

14-series Sinew-Transforming Exercises by Weizhen Chang
ISBN 7119006363

Links:
Yijin Jing wikipedia.org
Yi Jin Jing Qigong egreenway.com by Michael P. Garofalo