1.
Kang DY, Kim J, Kim Y, Law H-F. On the Number of $r$-Matchings in a Tree. Electron. J. Combin. [Internet]. 2017Feb.3 [cited 2026Mar.14];24(1):P1.24. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v24i1p24