Zariski, Oscar (1958). "Introduction to the Problem of Minimal Models in the Theory of Algebraic Surfaces". American Journal of Mathematics. 80: 146–184. doi:10.2307/2372827. JSTOR2372827.
Zariski, Oscar (1958). "Introduction to the Problem of Minimal Models in the Theory of Algebraic Surfaces". American Journal of Mathematics. 80: 146–184. doi:10.2307/2372827. JSTOR2372827.