Mendel and mathematics
N.H. Barton, Trends in Genetics 17 (2001) 420–420.

Footprints of primordial introns on the eukaryotic genome: still no clear traces 
Y. Wolf, F. Kondrashov, E. Koonin, Trends in Genetics 17 (2001) 499–501.

No footprints of primordial introns in a eukaryotic genome
Y. Wolf, F. Kondrashov, E. Koonin, Trends in Genetics 16 (2000) 333–334.