The Complexity of the Matroid Homomorphism Problem. - Cheolwon Heo; Hyobin Kim; Mark H. Siggers (Electron. J. Comb., 2023)

Recognizing even-cycle and even-cut matroids. - Bertrand Guenin; Cheolwon Heo (Math. Program., 2023)

Small separations in pinch-graphic matroids. - Bertrand Guenin; Cheolwon Heo (Math. Program., 2024)

Recognizing pinch-graphic matroids. - Bertrand Guenin; Cheolwon Heo (Math. Program., 2024)

Signed graphs with the same even cycles. - Bertrand Guenin; Cheolwon Heo; Irene Pivotto (Comb., 2025)