The Esquisses de danses (Dance Sketches) of 1932 are a good example of the diverse Martinů’s influences of American jazz, his Czech roots, his profound encounters with Stravinsky’s music, and, most importantly, Albert Roussel’s rôle as mentor, quickly merged into the fully matured compositional style of his Parisian period. The autograph is now preserved in the Berlin State Library.
Mark Gresham, Martinů: Complete Piano Music 1, Naxos, 2006.