BibSlavKon: 4 hits for Király, P.

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 Király, P. provides 4 hits
1	Nazvanije vengrov „ugri“ i vostočnyje slavjane Király, P. - Hungaro-Slavica 1983 : IX. Internationaler Slavistenkongress : Kiev, 6.-13. September 1983 (1983), 167-183
2	Die slawischen Mundarten in Ungarn und die ungarländischen Druckwerke in slawischen Sprachen Király, P. - Studia Slavica Academiae scientiarum Hungaricae 19 (1973) 1/3, 149-164
3	Atlas slovackich dialektov v Vengrii Király, P. - Studia slavica Academiae scientiarum hungaricae 9 (1963) 1/4, 45-54
4	Zur Frage der ältesten slowakischen Sprachdenkmäler Király, P. - Studia slavica Academiae scientiarum hungaricae 4 (1958) 1/4, 113-158

Bibliography of International Congresses of Slavists (BibSlavKon)

Nazvanije vengrov „ugri“ i vostočnyje slavjane

Die slawischen Mundarten in Ungarn und die ungarländischen Druckwerke in slawischen Sprachen

Atlas slovackich dialektov v Vengrii

Zur Frage der ältesten slowakischen Sprachdenkmäler