Please answer a question about the following article about Frédéric Chopin:

Works published since 1857 have received alternative catalogue designations instead of opus numbers. The present standard musicological reference for Chopin's works is the Kobylańska Catalogue (usually represented by the initials 'KK'), named for its compiler, the Polish musicologist Krystyna Kobylańska.

The Kobylańska Catalogue was named for who?
Krystyna Kobylańska