Forbidden subsequences. - Zvezdelina Stankova (Discret. Math., 1994)

Classification of Forbidden Subsequences of Length 4. - Zvezdelina Stankova (Eur. J. Comb., 1996)

321-Polygon-Avoiding Permutations and Chebyshev Polynomials. - Toufik Mansour; Zvezdelina Stankova (Electron. J. Comb., 2002)

Explicit enumeration of 321, hexagon-avoiding permutations. - Zvezdelina Stankova; Julian West (Discret. Math., 2004)

Shape-Wilf-Ordering on Permutations of Length 3. - Zvezdelina Stankova (Electron. J. Comb., 2007)