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 Mariage blanc:

"

A mariage blanc may also result if one or both partners discover after their wedding that they are either incapable of, or unwilling to take part in, (productive) sexual intercourse, for example, due to asexuality, impotence or frigidity, chronic illness or disability. The marriages of Thomas Carlyle,[1] John Ruskin, Freya Stark and Max Beerbohm are alleged to have not been consummated through impotence. The brief marriage of Tchaikovsky might be described as a "lavender marriage".