@article{Szeider04c,
 author = {Stefan Szeider},
 gsid = {https://scholar.google.com/scholar?oi=bibs&hl=en&cites=17971244647732079817},
 journal = {Ars Combinatoria},
 pages = {53-64},
 title = {On Theorems Equivalent with {K}otzig's Result on Graphs 
with Unique 1-Factors},
 url = {https://www.ac.tuwien.ac.at/files/pub/szeider-AC-2004.pdf},
 volume = {73},
 year = {2004}
}