Hilbert’s 16th Problem: How Many Cycles?
2008 ◽
Vol 244
(6)
◽
pp. 1359-1394
◽
2010 ◽
Vol 10
(2)
◽
pp. 317-335
◽
2007 ◽
Vol 31
(5)
◽
pp. 1118-1134
◽
2008 ◽
Vol 18
(03)
◽
pp. 877-884
◽