On the secondary nature of ‘Son of God’ in Mark 1:1 see Peter Head.
 Collins and Collins, King and Messiah as Son of God, 126.
 Donahue, The Gospel of Mark, 60.
 Francis J. Moloney, Mark: Storyteller, Interpreter, Evangelist (Peabody, MA: Hendrickson, 2004), 132; I. Howard Marshall, ‘Jesus as Messiah in Mark and Matthew,’ in The Messiah in the Old and New Testaments, ed. S.E. Porter (Grand Rapids, MI: Eerdmans, 2007), 121.
 See now Peter G. Bolt, The Cross from a Distance: Atonement in Mark’s Gospel (NSBT; Downers Grove, IL: IVP, 2004).