Uda, S. (December 1925). "On the Wireless Beam of Short Electric Waves". The Journal of the Institute of Electrical Engineers of Japan. Institute of Electrical Engineers of Japan: 1128. (This was the preface and notice in advance for a series of eleven papers, of the same title, by Uda, between 1926 and 1929, on the antenna. However, it seems that Uda's pre-announcement caused his invention to lose its novelty and become unpatentable. He would not have been informed by Professor Yagi about those.)
