Mamoru Sekido, Kazuhiro Takefuji, Hideki Ujihara, Tetsuro Kondo, Masanori Tsutsumi, Eiji Kawai, Hidekazu Hachisu, Nils Nemitz, Marco Pizzocaro, Cecilia Clivati, et al. A broadband VLBI system using transportable stations for geodesy and metrology: an alternative approach to the VGOS concept. JOURNAL OF GEODESY. 2021. 95. 4
Marco Pizzocaro, Mamoru Sekido, Kazuhiro Takefuji, Hideki Ujihara, Hidekazu Hachisu, Nils Nemitz, Masanori Tsutsumi, Tetsuro Kondo, Eiji Kawai, Ryuichi Ichikawa, et al. Intercontinental comparison of optical atomic clocks through very long baseline interferometry. Nature Physics. 2021. 17. 2. 223-227
Takuya Akahori, Shinsuke Ideguchi, Takahiro Aoki, Kazuhiro Takefuji, Hideki Ujihara, Keitaro Takahashi. Optimum frequency of Faraday tomography to explore the intergalactic magnetic field in filaments of galaxies. Publications of the Astronomical Society of Japan. 2018. 70. 6
Hideki Ujihara, Kazuhiro Takefuji, Mamoru Sekido, Ryuichi Ichikawa. Development of Wideband Feed and Receiver System for Kashima 34m Antenna. NEW TRENDS IN RADIO ASTRONOMY IN THE ALMA ERA: THE 30TH ANNIVERSARY OF NOBEYAMA RADIO OBSERVATORY. 2013. 476. 421-422