Studying the singularity of LCM-type matrices via semilattice structures and their Möbius functions. - Pentti Haukkanen; Mika Mattila; Jori Mäntysalo (J. Comb. Theory A, 2015)

Studying the inertias of LCM matrices and revisiting the Bourque-Ligh conjecture. - Pentti Haukkanen; Mika Mattila; Jori Mäntysalo (J. Comb. Theory A, 2020)