1. Alexander, J.W.: A lemma on systems of knotted curves. Proc. Nat. Acad. Sci. USA 9, 93–95 (1923)
2. Artin, E.: Theorie der Zöpfe. Abh. Math. Sem. Univ. Hambg. 4(1), 47–72 (1925)
3. Borodzik, M., Hedden, M.: The Upsilon Function of L-Space Knots is a Legendre Transform (2015). arXiv e-prints:
arXiv:1505.06672
[math.GT]
4. Borodzik, M., Livingston, C.: Semigroups, $$d$$-invariants and deformations of cuspidal singular points of plane curves. J. Lond. Math. Soc. (2) 93(2), 439–463 (2016).
arXiv:1305.2868
[math.AG]
5. Bodnár, J., Némethi, A.: Lattice cohomology and rational cuspidal curves. Math. Res. Lett 23(2), 339–375 (2016).
arXiv:1405.0437
[math.AG]