Proceedings - Mathematical Sciences
Proceedings - Mathematical Sciences > 2010 > 120 > 3 > 299-316
Proceedings - Mathematical Sciences > 2014 > 124 > 4 > 487-496
Proceedings - Mathematical Sciences > 2010 > 120 > 3 > 299-316
Proceedings - Mathematical Sciences > 2014 > 124 > 4 > 487-496