I have a question about Seifert fibered 3-manifold while reading this survey paper: https://arxiv.org/pdf/math/0602562.pdf.
In Example 22 (p.10), it is said that for integers $a,b,c\geq 1$, set $S_{abc}:=(x^ay+y^bz+z^cx)\subset \Bbb C^3$. $S_{abc}$ is quasihomogeneous with weights $(bc-c+1,ca-a+1,ab-b+1)$, thus its link is a Seifert fibered 3-manifold $L_{abc}\to S^2$ with 3 multiple fibers of multiplicities $ab-b+1,bc-c+1,ca-a+1$.
I can see that $S_{abc}$ is quasihomogeneous with weights $(bc-c+1,ca-a+1,ab-b+1)$, but how does this imply that the $L_{abc}$ has a Seifert fibered structure? How is $L_{abc}\to S^2$ defined? And how do we know that it has 3 multiple fibers of multiplicities $ab-b+1,bc-c+1,ca-a+1$?