Marek Majer (17. marts 2017). "The 'fiver': Germanic 'finger', Balto-Slavic de-numeral adjectives in *-ero- and their Indo-European background". Philological Society. Transactions (engelsk). 115 (2): 239-262. doi:10.1111/1467-968X.12099. ISSN0079-1636. WikidataQ118299150.
Marek Majer (17. marts 2017). "The 'fiver': Germanic 'finger', Balto-Slavic de-numeral adjectives in *-ero- and their Indo-European background". Philological Society. Transactions (engelsk). 115 (2): 239-262. doi:10.1111/1467-968X.12099. ISSN0079-1636. WikidataQ118299150.
Marek Majer (17. marts 2017). "The 'fiver': Germanic 'finger', Balto-Slavic de-numeral adjectives in *-ero- and their Indo-European background". Philological Society. Transactions (engelsk). 115 (2): 239-262. doi:10.1111/1467-968X.12099. ISSN0079-1636. WikidataQ118299150.