We characterize the closed, oriented, Seifert fibered –manifolds which are oriented boundaries of Stein manifolds. We also show that for this class of –manifolds the existence of Stein fillings is equivalent to the existence of symplectic fillings.
Ana G Lecuona. Paolo Lisca. "Stein fillable Seifert fibered $3$–manifolds." Algebr. Geom. Topol. 11 (2) 625 - 642, 2011. https://doi.org/10.2140/agt.2011.11.625