In 1999 -- 2000 she was a Visiting Professor at the Department of Industrial and Manufacturing Systems Engineering , Lehigh University .
In 1997 -- 1999 she was a visitor at the Rutgers Center for Operations Research of Rutgers University .
In 1999 -- 2000 visitor was a visitor   at the Department of Industrial and Manufacturing Systems Engineering , Lehigh University .
In 1997 -- 1999 she was a visitor at the Rutgers Center for Operations Research of Rutgers University .