Kan extensions along promonoidal functors. Day, Brian, Street, Ross (1995) Theory and Applications of Categories [electronic only]
Morita equivalences of enriched categories Harald Lindner (1974) Cahiers de Topologie et Géométrie Différentielle Catégoriques
Note on Frobenius monoidal functors. Day, Brian, Pastro, Craig (2008) The New York Journal of Mathematics [electronic only]