Nicholas P. Lunn presents evidence that the Gospel of Luke (1st century) used the longer ending of Mark.
Nicholas P. Lunn, The Original Ending of Mark: A New Case for the Authenticity of Mark 16:9-20 (Eugene, Oregon: Pickwick Publications, 2014), 296-309
[Nicolas P. Lunn presents evidence that Luke 8:2 uses Mark 16:9 and Luke 24 uses Mark 16, including verses part of the “longer ending” (vv. 9-20]]