BibSlavKon: 2 hits for Yokoyama, Olga T.

The Bibliography of International Congresses of Slavists (1929-2018) was converted from thirteen printed volumes into a database in cooperation with the Slavonic Library in Prague (Slovanská knihovna Praha) and contains 8550 records. Since 2008 the Bibliography appear only in electronic form and will be updated in five-year interval according to the next Congresses of Slavists. The further information can be found here. The overview of the classification can be found: here.

Your search for Yokoyama, Olga T. provides 2 hits
1	Speech Genre Differences in the Fundamental Frequency of Russian Men and Women Yokoyama, Olga T. - Beiträge des Gender–Blocks zum XIII. Internationalen Slavistenkongress in Ljubljana 15.–21. August 2003 (2003), 7–28
2	Oppozicija svoj-čužoj v russkom jazyke Yokoyama, Olga T. - American Contributions to the Eleventh International Congress of Slavists : Bratislava, August - September 1993 : Literature : Linguistics : Poetics (1993), 452-459

Bibliography of International Congresses of Slavists (BibSlavKon)

Speech Genre Differences in the Fundamental Frequency of Russian Men and Women

Oppozicija svoj-čužoj v russkom jazyke