Wiechmann, R. J., R. D. Hanna, J. A. Stange, G. H. Johnson, R. I. Fernandes, and J. D. Rozich. “NextStitch: Double-Stranded Suture Chain, a Tool to Optimize Approximation of Sutures in Valve Surgery With Echocardiographic Correlation”. The Heart Surgery Forum, vol. 6, no. 1, Feb. 2005, pp. 24-29, doi:10.1532/hsf.788.