Maintenance work on the ZORA databases is scheduled for Wednesday 22 May 2019 from 20:00-22:00. During this period ZORA and JDB will not be available. Thank you for your understanding.
Ravi, S; Rosenthal, J; Saurer, J (1994). Algebraic and combinatorial aspects of the dynamic pole assignment problem. In: Helmke, U; Mennicken, R; Saurer, J. Systems and Networks II: Mathematical Theory and Applications. Berlin: Akademie Verlag, 547-550.