A Normal Form for Right Dominating Linear Language. - Matti Peltola (J. Inf. Process. Cybern., 1992)

The subtree center of a tree. - Juhani Nieminen; Matti Peltola (Networks, 1999)

Some Structural Properties of a Least Central Subtree of a Tree. - Martti Hamina; Matti Peltola (Algorithmic Oper. Res., 2010)

Two Characterizations of Hypercubes. - Juhani Nieminen; Matti Peltola; Pasi Ruotsalainen (Electron. J. Comb., 2011)

Least central subtrees, center, and centroid of a tree. - Martti Hamina; Matti Peltola (Networks, 2011)