Bibliography of International Congresses of Slavists (BibSlavKon)

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 L5527 provides 2 hits
1	Ľalternance ja/je de ľancien ъ en bulgare moderne Bernard, R. - Revue des études slaves 34 (1957) 1/4, 15-31
2	Aspect et modalité : à propos de ľalternance perfectif / imperfectiv dans les énoncés modaux Paillard, Denis - Revue des études slaves 60 (1988) 1, 65-76

Bibliography of International Congresses of Slavists (BibSlavKon)

Ľalternance ja/je de ľancien ъ en bulgare moderne

Aspect et modalité : à propos de ľalternance perfectif / imperfectiv dans les énoncés modaux