Factorization systems for symmetric cat-groups. Kasangian, S., Vitale, E.M. (2000) Theory and Applications of Categories [electronic only]
Fibrations in bicategories Ross Street (1980) Cahiers de Topologie et Géométrie Différentielle Catégoriques
Framed bicategories and monoidal fibrations. Shulman, Michael (2008) Theory and Applications of Categories [electronic only]
Free A ∞ -categories. Lyubashenko, Volodymyr, Manzyuk, Oleksandr (2006) Theory and Applications of Categories [electronic only]
Free extensions of double categories R. J. M. Dawson, R. Pare, D. A. Pronk (2004) Cahiers de Topologie et Géométrie Différentielle Catégoriques
Frobenius algebras and ambidextrous adjunctions. Lauda, Aaron D. (2006) Theory and Applications of Categories [electronic only]
Frobenius objects in cartesian bicategories. Walters, R.F.C, Wood, R.J. (2008) Theory and Applications of Categories [electronic only]