1. Measurement in medicine: the analysis of method comparison studies;Altman;Statistician,1983
2. Statistical methods in medical research;Armitage,1971
3. British Standards Institution, 1979. Precision of test methods I. Guide for the determination and reproducibility for a standard test method (BS 5497, part 1). BSI, London.
4. D’Arbela, P.G., Silayan, Z.M., Bland, J.M. Comparability of M-mode echocardiography long axis and short axis left ventricular function derivatives, unpublished.
5. Relationship between initial blooc pressure and its fall with treatment;Gill;Lancet,1985