Takagi H. Constructing prime $\mathbb{Q}$-Fano threefolds of codimension four via key varieties related with $\mathbb{P}^2\times \mathbb{P}^2$-fibrations. Math. Scand. [Internet]. 2025 Oct. 23 [cited 2025 Dec. 5];131(3). Available from: https://www.mscand.dk/article/view/158550