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O'Neill PG, Faitelson L, Taylor A, Puleo P, Roberts R, Pacifico A.O'Neill PG, et al. Among authors: roberts r.Am Heart J. 1991 Sep;122(3 Pt 1):709-14. doi: 10.1016/0002-8703(91)90515-j.Am Heart J. 1991.PMID: 1877446
Habib GB, Heibig J, Forman SA, Brown BG, Roberts R, Terrin ML, Bolli R.Habib GB, et al. Among authors: roberts r.Circulation. 1991 Mar;83(3):739-46. doi: 10.1161/01.cir.83.3.739.Circulation. 1991.PMID: 1900223Clinical Trial.
Marzoll U, Kleiman NS, Dunn JK, Verani MS, Minor ST, Roberts R, Raizner AE.Marzoll U, et al. Among authors: roberts r.J Am Coll Cardiol. 1991 Mar 1;17(3):613-20. doi: 10.1016/s0735-1097(10)80173-1.J Am Coll Cardiol. 1991.PMID: 1993777Free article.