TOUCHDOWN: References needed

[A428ENDE at VM1.SARA.NL]

Hi all there,
 
      I'm going to use this touchdown technique on PCR but because a silly prob
lem, I can not get anything from our library. Will any of you please be so kind
 to send the best references about this? I don't mind to get them by news or e-
mail, but probably it would be better by the news group so more people can get
it.
   Thanks a lot
 
 
Tino, PhD.