N. Chadwick, The British Heroic Age: the Welsh and the Men of the North, 1976.

E. J. Dobson, Hymn to the Virgin, 1953.

M. Filppula, J. Klemola, and H. Pitkänen, The Celtic Roots of English dans la série Studies in Languages, 2002.

L. Fleuriot and E. A. Freeman, A Dictionary of Old Breton The History of the Norman Conquest of England, Its Causes and Failures, 1867.

G. German, H. Härke, M. Thomas, and M. Stumpf, Limited Interethnic Marriage, Differential Reproductive Success and the Spread of 'Continental' Y Chromosomes in Early Anglo- Saxon England, Simulations, Genetics and Human Prehistory, pp.1-25, 2008.

G. German, L'analyse phonétique de trois poèmes anglogallois du 15 e siècle : l'orthographe galloise comme indice pour la prononciation de l'anglais moderne primitif, le système vocalique, Bulletin des Anglicistes Médiévistes, vol.57, pp.1-21, 2000.

G. German, L'analyse phonétique de trois poèmes anglogallois du 15 e siècle : l'orthographe galloise comme indice pour la prononciation de l'anglais moderne primitif, le système consonantique, Bulletin des Anglicistes Médiévistes, vol.58, pp.65-81, 2000.

G. German, Britons, Anglo-Saxons and Scholars: 19 th century Attitudes towards the Survival of Britons in Anglo-Saxon England, Celtic-Englishes II, pp.347-374, 2000.

H. Härke, kings and Warriors: Population and Landscape from Post-Roman to Norman Britain The Peopling of Britain: The Shaping of a Human Landscape, The Linacre Lectures, pp.145-175, 1999.

H. Härke, Population Replacement or Acculturation? An Archaeological Perspective on Population and Migration in Post-Roman Britain, Celtic-Englishes III, pp.13-28, 2003.

K. Jackson, Language and History in Early Britain: A Chronological Survey of the Brittonic Languages ? 1 st ? 10 th Centuries, 1953.

D. Lewis, The Welshmen of English Literature, pp.224-260, 1882.

D. Parry, A Survey of Anglo-Welsh Dialects: The Southeast, 1977.

D. Parry, A Survey of Anglo-Welsh Dialects: The Southwest, 1979.

D. Parry, On Producing a Linguistic Atlas: The Survey of Anglo- Welsh dialects, Studies in Linguistics Geography, pp.55-66, 1985.

D. Parry, A Grammar and Glossary of the Conservative Anglo- Welsh Dialects of Rural Wales, Sheffield: The National Centre for English Cultural Tradition, 1999.

T. H. Parry-williams, The English Element in Welsh: A Study of the English Loan, 1923.

T. H. Parry-williams, English-Welsh Loanwords, Angles and Britons, O'Donnell Lectures, pp.43-59, 1963.

R. Penhallurick, Welsh English: A National Language?, Dialectologia et Geolinguistica, vol.1993, issue.1, pp.28-46, 1985.
DOI : 10.1515/dig.1993.1993.1.28

R. Penhallurick, The Anglo-Welsh Dialects of North Wales, Frankfort-am-Main, 1991.

W. Stubbs, The Constitutional History of England, 1870.

B. Sykes, Adam's Curse, 2003.

A. Thomas, Welsh English Language in the British Isles, pp.178-194, 1984.

A. Thomas, Welsh English, Focus on England and Wales, pp.213-222, 1985.
DOI : 10.1075/veaw.g4.11tho

A. Thomas, English in Wales The Cambridge History of the English Language, pp.94-147, 1994.

H. Tristram, Attrition of Inflections in English and in Welsh The Celtic Roots of English (in the series Studies in Languages), pp.111-149, 2002.

H. Tristram, Why Don't the English Speak Welsh?, Britons in Anglo-Saxon England, 2008.
DOI : 10.1017/UPO9781846155185.016

H. Wild, A History of Modern Colloquial English, 3 rd Edition, 1956.