Generalized (P, w)-partitions and generating functions for trees. - Isao Arima; Hiroyuki Tagawa (J. Comb. Theory A, 2003)

Generalizations of Cauchy's determinant and Schur's Pfaffian. - Masao Ishikawa; Soichi Okada; Hiroyuki Tagawa; Jiang Zeng (Adv. Appl. Math., 2006)

Pfaffian decomposition and a Pfaffian analogue of q-Catalan Hankel determinants. - Masao Ishikawa; Hiroyuki Tagawa; Jiang Zeng (J. Comb. Theory A, 2013)

Jeśmanowicz' conjecture for non-primitive Pythagorean triples. - Hidetaka Kitayama; Hiroyuki Tagawa; Keiichi Urahashi (Period. Math. Hung., 2023)