A common written Greek source for Mark and Thomas

Horman, John, 1940- author.
Waterloo, Ont. : Wilfrid Laurier University Press, 2011.

The difficult sayings of Jesus

Neil, William, 1909-1979.
Grand Rapids : Eerdmans, [1975]

Figuring Jesus : the power of rhetorical figures of speech in the Gospel of Luke

Reich, Keith A.
Leiden ; Boston : Brill, 2011.

God is no more

Pelz, Werner, 1921-2006.
Philadelphia : J.B. Lippincott, 1964.

The hard sayings of Jesus

Bruce, F. F. (Frederick Fyvie), 1910-1990.
Downers Grove, Ill. : InterVarsity Press, [1983]

The sayings of Jesus, their background and interpretation.

Robinson, Benjamin Willard, 1883-1942.
New York and London : Harper & brothers, 1930.

Selfhood and sacrifice; the seven problems of the atoning life

Gavin, Frank (Frank Stanton Burns), 1890-1938.
Milwaukee, Wis. : Morehouse publishing co., [1932]