BibSlavKon: 796 hits for 11 on page 12

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 Volume 11 provides 796 hits
111	Kirilometodievskata tradicija vo parimejniot tekst od triodite Orbelski i Chludov Ribarova, Zdenka - Referati na makedonskite slavisti za XI Meģunaroden slavistički kongres vo Bratislava (1993), 91-98
112	Drevnerusskaja epigrafika X-XIII vv.: tekst i norma Roždestvenskaja, Taťjana Vsevolodovna - Russian Linguistics : International Journal for the Study of the Russian Language 17 (1993) 2, 157-179
113	Vyšegrad na Dunaje i Sazava Tóth, Imre H. - Studia slavica Academiae scientiarum hungaricae 38 (1993) 1/2, 191-202
114	Cyrilometodějská misie v kulturním kontextu soudobé Evropy Vavřínek, Vladimír - Česká slavistika 1993 : české přednášky pro XI. mezinárodní sjezd slavistů - Bratislava, 30.8.-8.9.1993 (1993), 235-240
115	La tradizione della letteratura cirillometodiana : (Vita Constantini, Vita Methodii, Encomio di Cirillo, Panegirico di Constantino e Metodio, Sulle Lettere di Chrabr) Ziffer, Giorgio - Ricerche slavistiche (1993), 263-289
116	Čes’ki j slovac’ki budyteli ta ukrajins’ki kyrylomefodijivci : (koncepciji rozvytku slov’jans’kych narodiv, jich mov i literatur) Žytnyk, Volodymyr; Rusanivs'kyj, Vitalij - Slov’jans’ke movoznavstvo : dopovidi : XI Mižnarodnyj z’jizd slavistiv : Bratyslava, 30 serpnja - 8 veresnja 1993 r. (1993), 162-176
117	Jan Gus i vostočnoje slavjanstvo : (po materialam novonajdennogo istočnika) Begunov, Jurij Konstantinovič - Trudy Otdela drevnerusskoj literatury (1996), 356-375
118	Jan Gus i vostočnoje slavjanstvo : (po materialam novonajdennogo istočnika) Begunov, Jurij Konstantinovič - Nemerknuščij svet : iz istorii knižnych svjazej Bolgarii i Rossii XI - načalo XIX veka (1996), 284-313
119	Ancora su Scharija e gli ebrei a Novgorod Cavaion, Danilo - Ricerche slavistiche (1993), 127-154
120	Il „Laodikijskoe poslanie“ : giudaizzanti e prima riforma De Michelis, Césare G. - Ricerche slavistiche (1993), 155-170

Bibliography of International Congresses of Slavists (BibSlavKon)