Bioactive polyacrylamide hydrogels with gradients in mechanical stiffness.Published in:Biotechnology & Bioengineering, 2013, v. 110, n. 5, p. 1508, doi. 10.1002/bit.24810By:Diederich, Vincent E.G.;Studer, Peter;Kern, Anita;Lattuada, Marco;Storti, Giuseppe;Sharma, Ram I.;Snedeker, Jess G.;Morbidelli, MassimoPublication type:Article