Binocular Vertical DiplopiaMayo Clin Proc 73:55-66, Brazis,P.W.&Lee,A.G., 1998
Ocular Myasthenia GravisJ Natl Med Assoc 85:681-684, March,G.A.&Johnson,J.N., 1993
Myasthenic (Verticle) Nystagmus1970., Keane,J.R.&Hoyt,JAMA 212:1209, 1970