A rebuttal of Neumann, The vibrato controversy (see RILM 8965). The published writings of Galeazzi (1791-96), Geminiani (1751), Robert Bremner (1777), Carl Friedrich Cramer (1783), L. Mozart (1756), and the correspondence of W.A. Mozart (1778) maintain that vibrato was usually not employed by ripienists in 18th-c. orchestras, but only by soloists, and then used sparingly compared to modern practice.
"Vibrato in Eighteenth Century Orchestras,"
Performance Practice Review:
1, Article 4.
Available at: http://scholarship.claremont.edu/ppr/vol4/iss1/4