Try these articles:

http://www.sciencedirect.com/science/article/pii/S1381116908002744

(DOI: 10.1016/j.molcata.2008.06.003)

Beilstein Journal of Organic Chemistry 2008, 4, No. 17.

doi:10.3762/bjoc.4.17

Included are two attachments. The Verkade publication contains some useful references, while the Schering-Plough paper also gives examples of high-yielding additions to t-butyl acrylate. The topic you raised is a very broad one, people use base catalysis, equimolar base, acid catalysis, radical conditions (work well in EtOH), you name it... t-Butyl esters are sometimes preferred, steric bulk around the nucleophilic center can help avoid the bis-Michael, etc.

Just googling:

Check http://www.tandfonline.com/doi/abs/10.1080/00304948709356215#.VD8SvGd0zSc

http://www.sciencedirect.com/science/article/pii/S0040403905015510

and perhaps fifty more...

Check out USPat 8,524,958.  It discusses the selective addition of polyacrylates to Michael donors through catalyst selection.  Highest selectivity is obtained using coordinating Li+ bases, lowest using R4N+ and other noncoordinating bases.

Thank you very much for your contribution.