Sufficient conditions are obtained for the global stability of the positive
equilibrium of dx/dt = rx(t){1 - ax(t) - b Sigma(j=0)(infinity) c(j)x([t -
j])} It is shown that for certain special cases, solutions of the equation
can have chaotic behaviour through period doubling bifurcations. (C) 1999 E
lsevier Science Inc. All rights reserved.