1.
Pregnancies after fertilization and cleavage in human coculture
by Bongso, Ariff
Journal of In Vitro Fertilization and Embryo Transfer, 1991-04, Vol.8 (2), p.116-117

2.
THE EFFECT OF FLOODING AND AERATION ON THE MOBILITY OF CERTAIN TRACE ELEMENTS IN SOILS
by Kee, NG Siew
Plant and soil, 1962-02-01, Vol.16 (1), p.108-135
