## Volume 70 Part 1 (2018)

• Xueliang Li and Yan Zhao
• On extremal graphs with exactly one Steiner tree connecting any $k$ vertices, p.1
• Slobodan Filipovski
• Elia Saini
• A new presentation for the inner Tutte group of a matroid, p.15
• Yaping Mao
• Constructing internally disjoint pendant Steiner trees in Cartesian product networks, p.28
• A.D. Forbes and T.S. Griggs
• Designs for graphs with six vertices and nine edges, p.52
• Mohsen Aliabadi and Mano Vikash Janardhanan
• On local matching property in groups and vector spaces, p.75