Did the male ABBA members Björn Ulvæus and Benny Andersson ever do the lead singing in their ABBA career?

Question

It seems to me that the female members Agnetha Fältskog and Anni-Frid Lyngstad did most of the singing.

Answer 1

http://www.abbaomnibus.net/songs/whosing...

Answer 2

The men sang quite a bit on the early albums. Also very occasionally on the later ones ("Does Your Mother Know" is one example).