1. A boy with heart failure, a thick tongue, and double vision;Karsten;Lancet,1997
2. Arrythmia—A Guide to Clinical Electrocardiology;Sandoe,1991
3. Disorders of calcium and magnesium metabolism;Zwanger,1991
4. Eye movement disorders and diplopia;Lavin,1996
5. Diseases of the parathyroid gland and other hyper-and hypocalcemic disorders;Potts,1994