WASET
    Ahmed S. Fayed and  Umima M. Mansour,  Miniaturized PVC Sensors for Determination of Fe2+, Mn2+ and Zn2+ in Buffalo-Cows’ Cervical Mucus Samples.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2016, vol. 119(11). 1354 - 1360
    [viewed 16 April 2024]. Available from: https://publications.waset.org/pdf/10005703.