In *"Standard conjectures of algebraic cycles"* Grothendieck says:



> 
> "... These [Standard conjectures] are not really new, and they were worked out about three years ago independently by Bombieri and myself..."
> 
> 
> 


Did Bombieri publish something of this work?



Is there any publication of Bombieri about the standard conjectures on algebraic cycles?
Here's Bombieri's [publication list](http://www.unipi.it/ateneo/comunica/cerimonie/honoris/pubblicazioni.htm) and there seems to be just one paper that could qualify [1], unfortunately not available online. A later paper with Andreotti [2] is online, but does not quite seem to be the one. 


[1] E. Bombieri, [Varieta algebriche omeomorfe](http://www.worldcat.org/title/symposia-mathematica-vol-2-convegni-del-1968-analisi-funzionale-e-geometria/oclc/84461640) (1968).


[2] A. Andreotti and E. Bombieri, [Sugli omeomorfismi delle varieta algebraiche](http://archive.numdam.org/ARCHIVE/ASNSP/ASNSP_1969_3_23_3/ASNSP_1969_3_23_3_431_0/ASNSP_1969_3_23_3_431_0.pdf) (1969).


Incidentally, it seems Grothendieck was alerted to Bombieri's work by Serre in a [letter from 1964:](http://www.amazon.com/gp/search?index=books&linkCode=qs&keywords=9780821834244)


![](https://ilorentz.org/beenakker/MO/bombieri.png)


