Load-based covert channels between Xen virtual machines. - Keisuke Okamura; Yoshihiro Oyama (SAC, 2010)

Controlling the speed of virtual time for malware deactivation. - Keisuke Okamura; Yoshihiro Oyama (APSys, 2012)

Scientometric engineering: Revealing spatiotemporal citation dynamics via open eprints. - Keisuke Okamura (CoRR, 2021)

A half-century of international research collaboration dynamism: Congregate or disperse? - Keisuke Okamura (CoRR, 2022)

Scientometric engineering: Exploring citation dynamics via arXiv eprints. - Keisuke Okamura (Quant. Sci. Stud., 2022)

Evolving landscape of US-China science collaboration: Convergence and divergence. - Kensei Kitajima; Keisuke Okamura (CoRR, 2023)

A half-century of global collaboration in science and the "Shrinking World". - Keisuke Okamura (Quant. Sci. Stud., 2023)

Evolving interdisciplinary contributions to global societal challenges: A 50-year overview. - Keisuke Okamura (CoRR, 2024)

Atlas of Science Collaboration, 1971-2020. - Keisuke Okamura (SN Comput. Sci., 2024)

Hidden memory and stochastic fluctuations in science. - Keisuke Okamura (CoRR, 2025)