- Hartmann, Frederik. 2023. Germanic Phylogeny. Oxford: Oxford University Press.
- Hartmann, Frederik. 2020. The Vandalic Language - Origins and Relationships. Heidelberg: Winter.
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- Hartmann, Frederik. (accepted). Mediated innovation: a new category in cladistics. Journal of Historical Linguistics.
- Hartmann, Frederik. (accepted). Causality in Language Change. International Encyclopedia of Language and Linguistics, 3rd Edition.
- Abercrombie, Cortnie, Hartmann, Frederik. (accepted). Causal AI: The Power of Why. In Larry Medsker (ed.), AI and Ethics Handbook, 2nd edition.
- Hartmann, Frederik, Johanna Nichols. (accepted). The Euro-African Transition Zone: Findings from geospatial phonology. In: Tom Güldemann, Jakob Lesage (eds.) Conference proceedings Workshop on the occasion of the 100th anniversary of the birth of Diedrich Westermann.
- Hartmann, Frederik. 2026. A computational approach to investigating phonological complexity with latent variables and dimensionality reduction. Phonology, 43:2.
- Hartmann, Frederik*, William Locke*, Elizabeth Brown. 2025. Computational detection of syllable boundaries in undeciphered languages using segment surprisal. Journal of Quantitative Linguistics.
- Hartmann, Frederik, Johanna Nichols. 2025. Geospatial effects on phonological complexity in the world’s languages. Linguistic Typology, 29:3.
- Heiszenberger, Elisabeth, Eva Reinisch, Frederik Hartmann, Elizabeth Brown, and Elissa Pustka. 2024. Perceptually easy second language phones are not always easy: the role of orthography and phonology in schwa realization in second language French. Language and Speech 68(2).
- Hartmann, Frederik, George Walkden. 2024. The strength of the phylogenetic signal in syntactic data. Glossa 9(1).
- Hartmann, Frederik. 2024. An agent-based modelling approach to wave-like diversification of language families. Diachronica (online first).
- Hartmann, Frederik, Sean Roberts, Paul Valdes, Rebecca Grollemund. 2024. Investigating environmental effects on phonology using diachronic models. Evolutionary Human Sciences.
- Hartmann, Frederik and Gerhard Jäger. 2023. Gaussian process models for geographic controls in phylogenetic trees. Open Research Europe (ORE).
- Bäumler, Linda and Frederik Hartmann. 2023.
Sociogeographical differences in the
pronunciation of Anglicisms in Spanish Acoustic vowel analysis using multilevel regression
models. In Pustka E., Quijada van den Berghe C. & Weiland V. (Eds.). Corpus
dialectology. Amsterdam: John Benjamins. 106 – 132.
- Hartmann, Frederik. 2022. Methodological problems in quantitative research on environmental effects in phonology. Journal of Language Evolution (JOLE), 7(1), 95–119.
- Hartmann, Frederik. 2022. Lexical and sublexical effects on diachronic stability and instability of phonological systems. A case study on Proto-Indo-European dorsal stops. Lingua, 273, 103308.
- Pustka, Elissa, Elisabeth Heiszenberger, and Frederik Hartmann. 2022. Pronunciation in progress: A longitudinal study on the development of obligatory liaison in French as a foreign language. Radical: A Journal of Phonology, 3, 45-88.
- Hartmann, Frederik and Chiara Riegger. 2022. The Burgundian language and its phylogeny. A cladistical investigation. North-Western European Language Evolution (NOWELE), 75(1), 42-80.
- Hartmann, Frederik. 2021. The phonetic value of the Proto-Indo-European laryngeals - A computational study using deep neural networks. Indo-European linguistics (IEUL), 9(1), 26-84.
- Hartmann, Frederik. 2021. Old Frisian breaking and labial mutation revisited. Amsterdamer Beiträge zur älteren Germanistik, 80(4), 462-475.
- Luo, Jiaming, Frederik Hartmann, Regina Barzilay, and Yuan Cao. 2021. Deciphering Undersegmented Ancient Scripts Using Phonetic Prior. Transactions of the Association for Computational Linguistics 9, 69–81.
- Hartmann, Frederik. 2019. Predicting Historical Phonetic Features using Deep Neural Networks: A Case Study of the Phonetic System of Proto-Indo-European. In Proceedings of the 1st international workshop on computational approaches to historical language change (pp. 98–108). Florence, Italy: Association for Computational Linguistics.
- Hartmann, Frederik. 2020. Review of Rudolf Schützeichel, Althochdeutsches Wörterbuch. 7., durchgesehene und verbesserte Auflage, Berlin/Boston 2012. Zeitschrift für deutsches Altertum und deutsche Literatur (ZfdA).
- Hartmann, Frederik. Review of Edgar Büttner (ed.), Unser vrouwen klage / Der Spiegel. (Altdeutsche Textbibliothek 124), Berlin/Boston 2017. Zeitschrift für deutsches Altertum und deutsche Literatur (ZfdA).
- Hartmann, Frederik. 2017. Gotisch-Lernmodul. dx.doi.org/10.15496/publikation-15544. Tübingen, 2017.