Olivieri, Luca M., (2019). "The early-historic funerary monuments of Butkara IV. New evidence on a forgotten excavation in outer Gandhara", in: Rivista Degli Studi Orientali, Nuova Serie, Volume XCII, Fasc. 1-2, Sapienza Università di Roma, Pisa-Roma, p. 231: "[T]he Swat Protohistoric Graveyards complex (henceforth: SPG), {was] first published by Chiara Silvi Antonini and Giorgio Stacul (1972). More recent studies and fieldwork, though, have changed the SPG chronologies (c. 1200-800 BCE) demonstrating that there are no SPG features posterior to 800 BCE (Vidale, Micheli and Olivieri 2016; Narasimhan et al. 2019)."
Olivieri, Luca M., (2019). "The Early-Historic Funerary Monuments of Butkara IV: New Evidence on a Forgotten Excavation in Outer Gandhara", in Rivista Degli Studi Orientali, Nuova Serie, Volume XCII, Fasc. 1-2, Sapienza Universitá di Roma, Instituto Italiano di Studi Orientali, Pisa-Rome, p. 231: "...More recent studies and fieldwork, though, have changed the SPG [Swat Protohistoric Graveyards] chronologies (c. 1200-800 BCE) demonstrating that there are no SPG features posterior to 800 BCE..."
Coningham, Robin, and Mark Manuel, (2008). "Kashmir and the Northwest Frontier", Asia, South, in (ed.) Deborah M. Pearsall, Encyclopedia of Archaeology, Elsevier, p. 740.
Narasimhan, Vagheesh M., et al. (2019). "The formation of human populations in South and Central Asia", in Science 365 (6 September 2019), p. 11: "...we estimate the date of admixture into the Late Bronze Age and Iron Age individuals from the Swat District of northernmost South Asia to be, on average, 26 generations before the date that they lived, corresponding to a 95% confidence interval of ~1900 to 1500 BCE..."
Antonini, Chiara Silvi (1973). "More about Swāt and Central Asia". East and West. 23 (3/4): 235–244. ISSN0012-8376. JSTOR29755885.
Stacul, Giorgio (1975). "The Fractional Burial Custom in the Swāt Valley and Some Connected Problems". East and West. 25 (3/4): 323–332. JSTOR29756090.
oxfordre.com
Olivieri, Luca Maria, (2022). "The Archaeology of Gandhāra", in: Oxford Research Encyclopedia of Anthropology 2022, Oxford University Press, Summary: "...Toward the end of the 2nd millennium, northern Gandhāra features a rather coherent settlement phenomenon marked by large graveyards, mainly with inhumations, which were labeled by previous scholarship as the 'Gandhāra Grave Culture' (1200–900 BCE). In this phase among the major cultural markers, the introduction of iron technology is noteworthy..."
pdfcoffee.com
Coningham, Robin, and Mark Manuel, (2008). "Kashmir and the Northwest Frontier", Asia, South, in: Encyclopedia of Archaeology 2008, Elsevier, p. 740: "[I]t appears to have emerged in the upper Indus Valley [...] and then spread across the Valleys of Swat, Dir and Chitral, and into the Vale of Peshawar[...]
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es.scribd.com
Coningham, Robin, and Mark Manuel, (2008). "Kashmir and the Northwest Frontier", Asia, South, in Deborah M. Pearsall (ed.), Encyclopedia of Archaeology, Elsevier, p. 740: "...A homogenous tradition of burial practices with associated ceramic and artifact assemblages, it appears to have emerged in the upper Indus Valley...and then spread across the Valleys of Swat, Dir and Chitral, and into the Vale of Peshawar..."
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Antonini, Chiara Silvi (1973). "More about Swāt and Central Asia". East and West. 23 (3/4): 235–244. ISSN0012-8376. JSTOR29755885.
