The Homotopoy Type of Four-Dimensional Knot Complements. Steven P. Plotnick — 1983 Mathematische Zeitschrift
Vanishing of Whitehead groups for Seifert manifolds with infinite fundamental group. Steven P. Plotnick — 1980 Commentarii mathematici Helvetici
Symmetries of planar growth functions. William J. Floyd; Steven P. Plotnick — 1988 Inventiones mathematicae