BibCzechLing: 84 hits for Celtic on page 9

The "Bibliography of the Czech Linguistics (BibCzechLing)" is provided by the Institute of the Czech Language of the Academy of Sciences of the Czech Republic (Ústav pro jazyk český AV). The database contains about 73.280 records and covers the period from 1992 till 2018. The list of subjects is located here.

Your search for Celtic provides 84 hits
81	Strength of analogy in the system of Indo-European numerals Blažek, Václav, in: Development of Language through the Lens of Formal Linguistics, München, Lincom Europa ; 2010, s. 1-14
82	Indo-European "two". Dedicated to Professor Radoslav Večerka in the year of his 70th birthday Blažek, Václav, in: Sborník prací Filozofické Fakulty Brněnské Univerzity = Studia minora Facultatis Philosophicae Universitatis Brunensis. A, Řada jazykovědná (SFFBU), 47, č. A 46, 1998, s. 5-25
83	Indo-European "one"and "first" Blažek, Václav, in: Sborník prací Filozofické Fakulty Brněnské Univerzity = Studia minora Facultatis Philosophicae Universitatis Brunensis. A, Řada jazykovědná (SFFBU), 48, č. A 47, 1999, s. 5-25
84	From Case to Adposition. The Development of Configurational Syntax in Indo-European Languages Hewson, John; Bubeník, Vít Amsterdam 2006

Bibliography of the Czech Linguistics (BibCzechLing)

Strength of analogy in the system of Indo-European numerals

Indo-European "two". Dedicated to Professor Radoslav Večerka in the year of his 70th birthday

Indo-European "one"and "first"

From Case to Adposition. The Development of Configurational Syntax in Indo-European Languages