by Haikal, N.Z. (Cairo Univ., Giza (Egypt). Botany Dept.)
Published in International journal of agriculture and biology (01.05.2007)

by Naguib, M.I, Haikal, N.Z, Ali, F.F
Published in Arab Gulf journal of scientific research (1985)

by Naguib, M.I, Hamed, A.A, Haikal, N.Z
Published in Arab Gulf journal of scientific research (1983)

by Naguib, M.I, Haikal, N.Z, Taleb, A.A
Published in Egyptian journal of botany (1983)

by Naguib, M.I, Ali, M.I, Haikal, N.Z, Sharaf, E.F
Published in Arab Gulf journal of scientific research (1986)

by Naguib, M.I, Hamed, A.A, Haikal, N.Z. (Cairo Univ. (Egypt). Faculty of Science)
Published in Egyptian Journal of Physiological Sciences (Egypt) (1985)