1. Trisecting 4-manifolds;Gay;Geom Topol,2016
2. Castro NA (2016) Relative trisections of smooth 4-manifolds with boundary. PhD thesis (University of Georgia, Athens, GA).
3. Castro NA Gay DT Pinzón-Caicedo J (2018) Diagrams for relative trisections. Pac J Math 294, 275, 305.
4. Castro NA Ozbagci B (2017) Trisections of 4-manifolds via Lefschetz fibrations. arXiv:1705.09854.
5. A note on 4-dimensional handlebodies;Laudenbach;Bull Soc Math France,1972