Wikipedia:Articles for deletion/Mister X (band)
I can attest to the Polish and Russian language articles being predominantly RS and not small-time self-published blogs. Anglophone world media outlets of the same calibre would be accepted without the blink of an eye. Per Herostratus's argument, they meet with 
— User:Iryna, 21:16, 5 August 2016 (UTC)
Stance: keep
Cited policy: WP:N (Wikipedia:Notability)