About Sola Scriptura...

The very earliest mention of the doctrine of Sola Scriptura was by Martin Luther as he was questioned in the Synod of Augsburg (Germany) in October 1518. In his appeal to the Council, Luther placed the Bible and his interpretation of it, above the Pope. In the Leipzig Disputation in July 1519, Luther went a step further and declared that Scripture ranked above a Church Council, and that Ecumenical Councils had already erred in matters of faith. For this he was formally ex-communicated on January 3, 1521 through the Papal Bull 'Decet Romanum Pontificem'.

Protestant doctrine of sola scriptura ("Scripture alone") teaches that every teaching in Christian theology (everything pertaining to "faith and practice") must be able to be derived from Scripture alone. This is expressed by the Reformation slogan Quod non est biblicum, non est theologicum ("What is not biblical is not theological," cf. Dictionary of Latin and Greek Theological Terms: Drawn Principally from Protestant Scholastic Theology, Richard A. Muller, Baker, 1985).

Sources for this section are:
'Martin Luther, His Life, and His Work', by Hartmann Grisar,
  a German Jesuit, 6 volumes, 1930 Vol 4: pgs 388-389.
'Church History', by Fr. John Laux, M.A., 1930, Pgs 420-434

Other thinking about Sola Scriptura:

The practical problems of Sola Scriptura...

A Critique of the Evangelical Doctrine of Solo Scripture

"The Transmission of the Scriptures" - John H. Skilton
"The Doctrine of Inspiration" - G.H. Hospers
"The Inspiration and Authority of Holy Scripture" - Herman Ridderbos
"The Authority of Scripture" - William Webster
"The Authority of Scripture" - Dr. John H. Armstrong
"Freedom and Authority" - Dr. J. I. Packer
"The Rule of Faith and Practice" - A. A. Hodge
"The Relevancy of Scripture" - Paul Woolley
"Our Lord's View of the Old Testament" - J. W. Wenham
"What Do We Mean by Sola Scriptura" - Dr. W. Robert Godfrey
"It is Written: Sola Scriptura" - Richard Bennett
"Sola Scriptura and the Church" - William Webster
"Scripture" - John Jewel
"The Human Writers of the Scripture" - E.J. Young
"'True' and 'Truth' in the Johannine Writings" - Geerhardus Vos
"The Study of the Word" - Elnathan Parr
"A Critique of the Evangelical Doctrine of Solo Scriptura" - Keith A. Mathison
"Biblical Inerrancy" - John H. Gerstner
"Difficulties in Scripture" - John Calvin
"The Speaking Voice" - A.W. Tozer
"Does God Speak Today Apart from the Bible?" - Dr. R. Fowler White
"What is the Word of God?" - Louis Berkhof
"Heresies" - D. Martyn Lloyd-Jones