## Volume 20 (1999)

- Talmage James Reid and Haidong Wu
- Xiaomin Bao
- Jerrold R. Griggs and K.B. Reid
- Landau's Theorem revisited, pp.19–24

- A. Panayotopoulos, A. Sapounakis and P. Tsikouras
- Matching generalized nested sets, pp.25–36

- Charles J. Colbourn and Alan C.H. Ling
- L.H. Clark, A. Meir and J.W. Moon
- Kazuhiko Ushio
- J. Gimbert
- Michael A. Henning and C.H.C. Little
- Peter J. Cameron
- An extremal problem related to biplanes, pp.97–100

- Darryn E. Bryant and Sheila Oates-Williams
- Derek Holton and Robert E.L. Aldred
- Michael Raines and Ping Zhang
- The Steiner distance dimension of graphs, pp.133–143

- Louis Caccetta and Samy El-Batanouny
- L.F. Fitina, Jennifer Seberry and Ghulam R. Chaudhry
- Miwako Mishima
- Lutz Volkmann
- Nicholas Hamilton and Abdollah Khodkar
- Yang Jian Sheng, Huang Yi Ru and Zhang Ke Min
- Colin Ramsay
- On the index of simple trades, pp.207–221

- C.C. Lindner and M. Flavia Mammana
- Martin Sutton and Mirka Miller
- Mod sum graph labelling of $H_{m,n}$ and $K_n$, pp.233–240

- A.D. Keedwell
- C.C. Lindner and A. Rosa
- James A. MacDougall and Gary L. Mullen
- Kazuhiko Ushio
- Peter Adams, Darryn E. Bryant and Saad I. El-Zanati