[pmid17208387]
L. Claude, C. Malet, P. Pommier, P. Thiesse, S. Chabaud, and C. Carrie,
"Active breathing control for Hodgkin's disease in childhood and adolescence: feasibility, advantages, and limits}",
Int. J. Radiat. Oncol. Biol. Phys., vol. 67, pp. 1470–1475, Apr, 2007.