Depends on how and what you count, yo. Do non-sonnets count?
Background (can be safely skipped)
Petrarch worked on his sequence to Laura, variously referred to as Il Canzoniere ("The Songbook"), Rerum Vulgarium Fragmenta ("Fragments of Common Things"), and Rime Sparse ("Scattered Rhymes"), throughout his poetic career. The ...
Could this possibly be:
Edgecombe, R. S. (2011). The deictic in “diese Töne”: Thoughts on the finale’s proem in the Ninth Symphony of Beethoven. Musical Times, 152(1917), 31–44. https://www.jstor.org/stable/41440729
This article is written from a musical point of view rather than literature. It is primarily about Beethoven's Ninth Symphony, but it does ...