Noricum (English Wikipedia)

"Vase de Ptuj". Encyclopédie de l'arbre celtique. Archived from the original on 29 June 2008.
"Tuile de Grafenstein". Encyclopédie de l'arbre celtique. Archived from the original on 29 June 2008.

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From a statement of Polybius, in his own time in consequence of the great output of gold from a mine in Noricum, gold lost one-third of its value. Ridgeway, William (1892). The Origin of Metallic Currency and Weight Standards. Oxford, England: Oxford University Press. p. 139.
"The province of Noricum Ripense extended along the right or southern bank of the Danube, between the river and the Noric Alps, and was bounded on one side by Raetia Secunda and the river Inn (Aenus) and on the other by the confines of Pannonia Superior—the district included in the modern province of Carinthia in Austria. Noricum Mediterraneum lay directly to the south, beyond the Noric Alps." Mierow, Charles C. (1915). "Eugippius and the Closing Years of the Province of Noricum Ripense". Classical Philology. 10 (2): 166–187. doi:10.1086/359963. JSTOR 261764.

Heather, Peter (2010). The Fall of the Roman Empire: A New History. Macmillan. p. 407.
Stülz, Jodok [in German] (1835). Geschichte des regulirten Chorherrn-Stiftes St. Florian: ein Beitrag zur Geschichte des Landes Österreich ob der Enns (in German). Linz: Haslinger. pp. 2–3.

Mackensen, Michael (1975). "The state of research on the 'Norican' silver coinage". World Archaeology. 6 (3): 249–275. doi:10.1080/00438243.1975.9979607. JSTOR 124094.
"The province of Noricum Ripense extended along the right or southern bank of the Danube, between the river and the Noric Alps, and was bounded on one side by Raetia Secunda and the river Inn (Aenus) and on the other by the confines of Pannonia Superior—the district included in the modern province of Carinthia in Austria. Noricum Mediterraneum lay directly to the south, beyond the Noric Alps." Mierow, Charles C. (1915). "Eugippius and the Closing Years of the Province of Noricum Ripense". Classical Philology. 10 (2): 166–187. doi:10.1086/359963. JSTOR 261764.

Mackensen, Michael (1975). "The state of research on the 'Norican' silver coinage". World Archaeology. 6 (3): 249–275. doi:10.1080/00438243.1975.9979607. JSTOR 124094.
"The province of Noricum Ripense extended along the right or southern bank of the Danube, between the river and the Noric Alps, and was bounded on one side by Raetia Secunda and the river Inn (Aenus) and on the other by the confines of Pannonia Superior—the district included in the modern province of Carinthia in Austria. Noricum Mediterraneum lay directly to the south, beyond the Noric Alps." Mierow, Charles C. (1915). "Eugippius and the Closing Years of the Province of Noricum Ripense". Classical Philology. 10 (2): 166–187. doi:10.1086/359963. JSTOR 261764.

Eichner, Heiner; Istenič, Janka & Lovenjak, Milan (1994). "Ein römerzeitlisches Keramikgefäs au Ptuj (Pettau, Poetovio) in Slowien mit Inschrift in unbekanntem Alphabet und epichorischer (vermutlich keltischer) Sprache" (PDF). Arheološki Vestnik (in German). 45: 131–142. Archived (PDF) from the original on 22 December 2015.
"Vase de Ptuj". Encyclopédie de l'arbre celtique. Archived from the original on 29 June 2008.
"Tuile de Grafenstein". Encyclopédie de l'arbre celtique. Archived from the original on 29 June 2008.

Stülz, Jodok [in German] (1835). Geschichte des regulirten Chorherrn-Stiftes St. Florian: ein Beitrag zur Geschichte des Landes Österreich ob der Enns (in German). Linz: Haslinger. pp. 2–3.