The Spectrum of Neurol Dis Assoc with Antiphospholipid Antibd, Lupus Anticoag & Anticardiolipin AntibdArch Neurol 44:876-883, Levin,S.R.&Welch,K.M.A., 1987
Antiphospholipid Antibody SyndromeJAMA 268:1451-1453, Lockshin,M.D., 1992