dear Tganga,
Spasticity cannot be reduced with exercises, only with medication and that doesn't actually reduce the disorder itself either. I can recommend googling stroke, spasticity, Botox and therapy for more information on treating stroke patients.
You can read all sorts of practicle tips on http://www.icelearningcenter.com/about-us/stroke-help
dear Itsraining,
The article you describe is somewhat outdated. It was published in 1994. So much has happenend since.
I also suggest you read all the relevant posts here on this forum. A lot has already been written on the subject.
Esther