Algebraic curvature tensors whose skew-symmetric curvature operator has constant rank 2. - Peter Gilkey; Tan Zhang (Period. Math. Hung., 2002)

Mathematics, Recursion, and Universals in Human Languages - Peter Gilkey; Susana Lopez Ornat; Alexandra Karousou (CoRR, 2009)

The Geometry of Walker Manifolds - Miguel Brozos-Vázquez; Eduardo García-Río; Peter Gilkey; Stana Nikcevic; Ramón Vázquez-Lorenzo (Morgan & Claypool Publishers, 2009)

Applications of Affine and Weyl Geometry - Eduardo García-Río; Peter Gilkey; Stana Nikcevic; Ramón Vázquez-Lorenzo (Morgan & Claypool Publishers, 2013)

Aspects of Differential Geometry I - Peter Gilkey; JeongHyeong Park; Ramón Vázquez-Lorenzo (Morgan & Claypool Publishers, 2015)

Aspects of Differential Geometry II - Peter Gilkey; JeongHyeong Park; Ramón Vázquez-Lorenzo (Morgan & Claypool Publishers, 2015)

Aspects of Differential Geometry III - Esteban Calviño-Louzao; Eduardo García-Río; Peter Gilkey; JeongHyeong Park; Ramón Vázquez-Lorenzo (Morgan & Claypool Publishers, 2017)

Aspects of Differential Geometry IV - Esteban Calviño-Louzao; Eduardo García-Río; Peter Gilkey; JeongHyeong Park; Ramón Vázquez-Lorenzo (Morgan & Claypool Publishers, 2019)

Aspects of Differential Geometry V - Esteban Calviño-Louzao; Eduardo García-Río; Peter Gilkey; JeongHyeong Park; Ramón Vázquez-Lorenzo (Morgan & Claypool Publishers, 2021)

Centrally harmonic spaces. - Peter Gilkey; J. H. Park (Period. Math. Hung., 2023)