@article{10_21136_MB_2022_0010_22, author = {Farley, Jonathan David}, title = {Does the endomorphism poset $P^P$ determine whether a finite poset $P$ is connected? {An} issue {Duffus} raised in 1978}, journal = {Mathematica Bohemica}, pages = {435--446}, publisher = {mathdoc}, volume = {148}, number = {4}, year = {2023}, doi = {10.21136/MB.2022.0010-22}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.2022.0010-22/} }