1. Bishop ON (1983) Comparing the mean of two samples. In: Statistics for biology — microcomputer edition. Longman Group Ltd, Harlow, UK, p 53
2. Dameron GW, Weingand KW, Duderstadt JM, Odioso LW, Dierckman TA, Schwecke W, Baran K (1992) Effect of bleeding site on clinical laboratory testing of rats: orbital venous plexus versus posterior vena cava. Lab Anim Sci 42(3):299–301
3. Home Office Report (1989) Statistics of scientific procedures on living animals in Great Britain. ISBC 0-10-111522-9, HMSO
4. Lehman EL (1959) Linear hypothesis. In: Testing statistical hypotheses. Wiley, New York, pp 303–306
5. McGuill MW, Rowan AN (1989) Biological effects of blood loss: implications for sampling volumes and techniques. Inst Lab Anim Resources (News) 31:5–18