<https://dinonline.org/2010/04/15/rabeinu-tam-when-mikva-music-in-sefirah/#webpage>
<http://schema.org/description>
"Hi! if we normally keep Rabbeinu Tam for Shabbos etc.. can my wife go IN the mikva 55 min after shkiya (she won't be home until after 72 minutes after"
<https://dinonline.org/2010/04/15/rabeinu-tam-when-mikva-music-in-sefirah/>