10737.
Indogermanische Forschungen: Zeitschrift für Indogermanistik und allgemeine Sprachwissenschaft 103 (1998)
de Gruyter
10738.
Blažek (Václav): Indo-European “four” .
In IF 103 (1998), pp. 112–134.
Includes reconstruction of Celtic forms (esp. OIr. cethair, cethéoir, cethramad, etc.).

18343.
Falileyev (Alexander), Isaac (Graham): Welsh cabl ‘calumny, blame, blasphemy’.
In IF 103 (1998), pp. 202–206.
Also on its connection to OIr. cob ‘victory’.