Compactness and finiteness theorems for isospectral manifolds. R. Brooks; P. Petersen; P. Perry — 1992 Journal für die reine und angewandte Mathematik
Mainfolds with small excess and bounded curvature. P. Petersen V; Z. Shen; S. Zhu — 1993 Mathematische Zeitschrift
Geometric finiteness theorems via controlled topology. C. Grove; P. Petersen; Jyh-Yang Wu — 1990 Inventiones mathematicae