The forcing relation on n-modal cycles is studied. If alpha is an n-modal cycle then the n-modal cycles with block structure that force alpha form a 2(n)-horseshoe above alpha. If n-modal beta forces alpha, and beta does not have a block structure over alpha, then beta forces a 2-horseshoe of simple extensions of alpha.
Transactions of the American Mathematical Society
Bernhardt, Chris, "On the Ordering of N-Modal Cycles" (1996). Math & Computer Science Faculty Publications. 3.
C. Bernhardt, On the Ordering of N-Modal Cycles, Transactions of the American Mathematical Society. 348 (9), 3827-3834.