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Richard Hermann. (1987). Analysis Symposium: Stravinsky's "Serenade en la" (1925) || Thoughts on Voice-leading and Set Theory in "Neo-Tonal" Works: the "Hymne" from Stravinsky's "Sérénade en la". Theory and Practice, 12(), 27–53. doi:10.2307/41054237 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research