Fleming AD, Palka P, McDicken WN, Fenn LN, Sutherland GR. Verification of cardiac Doppler tissue images using grey-scale M-mode images. Ultrasound Med Biol. 1996 Jan 1;22(5):573-81. doi: 10.1016/0301-5629(95)02065-9
Fleming AD, McDicken WN, Sutherland GR, Hoskins PR. Assessment of colour Doppler tissue imaging using test-phantoms. Ultrasound Med Biol. 1994 Jan 1;20(9):937-51. doi: 10.1016/0301-5629(94)90053-1
Lawson DH, Jick H, Rothman KJ. Coffee and tea consumption and breast disease. Surgery. 1981 Jan 1;90(5):801-3.