1. La Sulfone du 1,3-Ditertiobutylbutadiène
2. The di-t-butylthiophene-1,1-dioxide obtained by Gol'dfarb and Korsakova3, was assigned the structure of 2,5-di-t-butylthiophene-1,1-dioxide, partly on the fact that its m.p. (126–127°) was different from that of presumed III
3. Thesis;Wiersum U. E.,1968