BallsM. (1997). The Three Rs concept of alternatives to animal experimentation. In Animal Alternatives, Welfare and Ethics (ed. van ZutphenL.F.M., & BallsM.), pp. 27–41. Amsterdam, The Netherlands: Elsevier Science B.V.
2.
ElliottV. (2004). Animal terror tactics that damn a whole village. The Times, 21 August 2004, p. 5.
3.
BallsM., & CombesR.D. (2004). The UK National Centre for the Three Rs: pathway to progress or mere fig leaf?ATLA32, 61–64.
