Analysis of information sources in references of the Wikipedia article "Dacian language" in English language version.
{{cite book}}
: ISBN / Date incompatibility (help)"As is well known, the rise of Tosk as a recognizable dialec-tal unit involves two innovations that have parallels in early Romanian: Romanian centralized its *a in nasal contexts and part of the dialects underwent the development of intervocalic -n- to -r-. Romanian also famously borrowed vatër 'hearth' with patently Tosk va- and proceeded to spread it to wherever Vlachs expanded subsequently. The shared Tosk-Romanian innovations obviously constitute the final stage of the crucial and well-publicized period of Albanian-Romanian convergence. Since these inno-vations are found either not at all or only marginally in the Slavic loans into Romanian and Albanian, it follows that the rise of Tosk preceded both the expansion of Romanian and the influx of Slavic Ioans."
"As is well known, the rise of Tosk as a recognizable dialec-tal unit involves two innovations that have parallels in early Romanian: Romanian centralized its *a in nasal contexts and part of the dialects underwent the development of intervocalic -n- to -r-. Romanian also famously borrowed vatër 'hearth' with patently Tosk va- and proceeded to spread it to wherever Vlachs expanded subsequently. The shared Tosk-Romanian innovations obviously constitute the final stage of the crucial and well-publicized period of Albanian-Romanian convergence. Since these inno-vations are found either not at all or only marginally in the Slavic loans into Romanian and Albanian, it follows that the rise of Tosk preceded both the expansion of Romanian and the influx of Slavic Ioans."