## Volume 19 (1999)

- Jianguo Qian
- Wei Fuyi, Chu Maoquan and Wang Jianzhong
- On odd primitive graphs, pp.11–15

- Nirmala Achuthan, N.R. Achuthan and L. Caccetta
- Dachang Guo
- Justyna Kurkowiak
- G.B. Khosrovshahi, H.R. Maimani and R. Torabi
- Andrej Zlatoš
- The diameter of lifted digraphs, pp.73–82

- Li Guojun and Chen Chuanping
- Disjoint Hamiltonian cycles in graphs, pp.83–89

- Su Wenlong, Luo Haipeng, Zhang Zhengyou and Li Guiqing
- Tim Penttila and Ivano Pinneri
- Hyperovals, pp.101–114

- Hong Wang
- Chin-Lin Shiue
- The $\alpha$-labeling number of bipartite graphs, pp.123–128

- Bolian Liu and Zhou Bo
- Estimates on strict Hall exponents, pp.129–135

- Charlie H. Cooke and Iem Heng
- Michael E. Raines and Zsuzsanna Szaniszló
- Equitable partial cycle systems, pp.149–156

- Michael J. Plantholt and Shailesh K. Tipnis
- Jay S. Bagga, Lowell W. Beineke and Badri N. Varma
- Independence and cycles in super line graphs, pp.171–178

- E.S. Mahmoodian, Nasrin Soltankhah and Anne Penfold Street
- On defining sets of directed designs, pp.179–190

- Yu-Bin Gao and Yan-Ling Shao
- Jing Huang
- Which digraphs are round?, pp.203–208

- L.F. Fitina, Jennifer Seberry and Dinesh Sarvate
- On $F$-squares and their critical sets, pp.209–230

- Zhou Guofei and Zhang Kemin
- T. Aaron Gulliver
- Z. Eslami and B. Tayfeh-Rezaie
- On 2-$(v,3)$ trades of minimum volume, pp.239–251

- Neil P. Carnes, Anne Dye and James F. Reed
- Aung Kyaw
- M. Kouider and Z. Lonc
- B. Du
- P. Mark Kayll
- Gaetano Quattrocchi
- Blocking sets in balanced path designs, pp.283–286

- Michael S. Jacobson, André E. Kézdy and Jenő Lehel
- Scenic graphs II: non-traceable graphs, pp.287–307