Toen: Finitude homotopique etc. File Toen web publ dgalgsat.pdf.
http://ncatlab.org/nlab/show/differential+graded+algebra
http://www.ncatlab.org/nlab/show/differential+graded+coalgebra
http://ncatlab.org/nlab/show/differential+graded+Hopf+algebra
http://www.ncatlab.org/nlab/show/model+structure+on+dg-algebras
nLab page on DG-algebra