@article{10_37236_9747,
     author = {Santiago Guzm\'an-Pro and C\'esar Hern\'andez-Cruz},
     title = {Duality pairs and homomorphisms to oriented and unoriented cycles},
     journal = {The electronic journal of combinatorics},
     year = {2021},
     volume = {28},
     number = {3},
     doi = {10.37236/9747},
     zbl = {1470.05117},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/9747/}
}