1. Unknotting numbers and minimal knot diagrams;Bernhard;J. Knot Theory Ramifications,1994
2. A note on unknotting number;Bleiler;Math. Proc. Cambridge Philos. Soc.,1984
3. On Culler–Shalen seminorms and Dehn filling;Boyer;Ann. of Math. (2),1998
4. Note on complete sequences of integers;Brown;Amer. Math. Monthly,1961
5. Pretzel knots with unknotting number one;Buck;Comm. Anal. Geom.,2013