1.
Rivaroxaban versus enoxaparin for thromboprophylaxis after total knee arthroplasty (RECORD4): a randomised trial
by Turpie, Alexander GG, MD
The Lancet (British edition), 2009, Vol.373 (9676), p.1673-1680

2.
Diagnosis of deep-vein thrombosis: comparison of clinical evaluation, ultrasound, plethysmography, and venoscan with X-ray venogram
by Sandler, D A
The Lancet (British edition), 1984, Vol.2 (8405), p.716-719
