RFI: Vanessa cardui article

[Morten Dewald Drøgemüller Hansen]

Hi LEPS-netters

I'm looking for a research article quoted by Stefanescu in Misc. Zool.
20(2): 31-48. The title of the article is

Pollard, E., van Swaay, C.A.M., Stefanescu, C., Lundsten, K.E., Maes, D &
Greatorex-Davies, J.N. (submitted): Migration of the painted lady
butterfly Cynthia cardui in Europe: evidence from monitoring.

The article is from 1997 or 1998. Can anyone give me the resource of this
article?

Thanks in advance and kind regards
Morten DD Hansen
Aarhus, Denmark