RETRACTED: Numerical treatment of nonlinear mixed delay differential equations

Reason: The author has plagiarized part of a paper that had already appeared in J. Math. Biol., 24 (1986) 583-601, doi:10.1007/BF00275686. One of the conditions of submission of a paper for publication is that authors declare explicitly that their work is original and has not appeared in a publication elsewhere. Re-use of any data should be appropriately cited. As such this article represents a severe abuse of the scientific publishing system. The scientific community takes a very strong view on this matter and we apologize to readers of the journal that this was not detected during the submission process.