| 2012 |
Operator methods for boundary value problems |
Hassi, Seppo; de Snoo Hendrik S.V.; Szafraniec, Franciszek H. |
| 2012 |
On Calkin's abstract symmetric boundary conditions |
Hassi, Seppo; Wietsma, Hendrik Luit |
| 2012 |
Dirac structures and boundary relations |
Hassi, Seppo; van der Schaft, Arjan J; de Snoo, Hendrik S.V.; Zwart, Hans J. |
| 2012 |
John Williams Calkin: a short biography |
Hassi, Seppo; de Snoo, Hendrik S.V.; Szafraniec, Franciszek H. |
| 2012 |
Boundary triplets and Weyl functions. Recent developments |
Derkach, V.A.; Hassi, Seppo; Malamud, M.M.: de Snoo, Hendrik S.V. |
