This paper puts forth an argument that Polish and English differ with respect to the aspectual scope of the imperfective (a.k.a. the progressive). […]
In Proceedings of the North East Linguistic Society 23, Vol. 2, Amy Schäfer (ed.), pp. 383–397. GLSA, University of Massachusetts at Amherst. 1993.
Paper, scan (grayscale, 300 dpi)
http://pinon.sdf-eu.org/covers/nripe.html