 In the 1950s, David Oistrakh invited Yulia Brodskaya to be his assistant in teaching solo and chamber music and Rosa Fine as his assistant for solo students.From 1940 to 1963, Oistrakh performed extensively in a trio that also included the cellist Sviatoslav Knushevitsky and the pianist Lev Oborin.It was sometimes called the 'Oistrakh Trio.'