The first resource here is a sermon by Tim Keller preached at Redeemer Presbyterian Church in Manhattan, NY in 2003:
The religious leaders in Jesus' time had a long list of rules regarding the Sabbath. When questioned, Jesus does not respond by dismissing the Sabbath, but rather redefines it - by dying on a cross. As Christians, we are able to enter into his rest and enjoy the same rest that God enjoyed after creation, by means of his works, not ours. The Sabbath is a blessing from God and one we will only enjoy if we understand it correctly.
The second is an article that Keller mentions in his sermon by Judith Shulevitz called "Bring Back the Sabbath"