Peruga, J. Z., A. Bielecka-Dabrowa, and J. D. Kasprzak. “The Unligated Left Internal Mammary Artery Side Branch As the Cause of Angina After Coronary Artery Bypass Grafting”. The Heart Surgery Forum, vol. 15, no. 4, Aug. 2012, pp. E240-E241, doi:10.1532/HSF98.20111168.