Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page The Velvet Underground & Nico:

"

Cale's viola was used on several of the album's songs, notably "Venus in Furs" and "Black Angel's Death Song". The viola used guitar and mandolin strings, and when played loudly, Cale would liken its sound to that of an airplane engine.[2] Cale's technique usually involved drones, detuning and distortion.[3] According to Robert Christgau, the "narcotic drone" not only sustains the sadomasochism-themed "Venus in Furs", but it also "identifies and unifies the [album] musically". Of the vocal performances, he believed "Nico's contained chantoozy sexuality" complemented "the dispassionate abandon of Reed's chant singing".[4]