Discrete Applied Mathematics
Discrete Applied Mathematics > 2011 > 159 > 16 > 1666-1675
Discrete Applied Mathematics > 2011 > 159 > 16 > 1759-1774
Discrete Applied Mathematics > 2011 > 159 > 16 > 1666-1675
Discrete Applied Mathematics > 2011 > 159 > 16 > 1759-1774