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 Ilievski, P. Ch. provides 2 hits
1	Leksički relikti od stariot balkanski jazičen sloj vo južnoslovenskite jazici Ilievski, P. Ch. - Referati na makedonskite slavisti za IX Meģunaroden slavistički kongres vo Kiev (1983), 7-14
2	Prilog kon chronologijata na eden balkanizam vo makedonskiot jazik : konstrukcii so udvoen objekt Ilievski, P. Ch. - Makedonski jazik 13/14 (1962/1963) 1/2, 67-85

Bibliography of International Congresses of Slavists (BibSlavKon)

Leksički relikti od stariot balkanski jazičen sloj vo južnoslovenskite jazici

Prilog kon chronologijata na eden balkanizam vo makedonskiot jazik : konstrukcii so udvoen objekt