One from Nathan Benefield the Commonwealth Foundation.
One op-ed by Jerry Shenk that was recently published in the Patriot News. One part I really liked:
"Similarly, the legislature should require unions to face their constituent members every two years, to prove their value to the workers whose dues Pennsylvania currently confiscates on the unions’ behalf, and, using secret ballots, guarantee workers the freedom to re-certify their bargaining units – or to decertify them without lengthy, expensive court challenges."
Also, I was recently pointed to this website, which has collections of articles on right-to-work and other timely topics.