5-Apr-65, I.N. Bernstein.
26-Apr-65, I.N. Bernstein.
18-Oct-65, I.N. Bernstein.
12-Sep-66, I.N. Bernstein.
19-Sep-66, I.N. Bernstein.
26-Sep-66, I.N. Bernstein.
12-Feb-68, I.N. Bernstein.
19-Oct-70, I.N. Bernstein.
15-Feb-71, I.N. Bernstein.
1-Mar-71, I.N. Bernstein.
20-Sep-71, I.N. Bernstein. (guests: H.Cartan, P.Cartier, Kuiper, P.Deligne, M.Atiyah)
30-Oct-72, I.N. Bernstein.
18-Oct-76, I.N. Bernstein.
22-Nov-76, I.N. Bernstein.