Abdelbary, A. I. and Ahmed, A. E. (2016) “Design of a Simple UV Double Beam Spectrophotometer Detector Based on a High Gain Trans Impedance Operational Amplifiers for RNA Measurement”, International Journal of Recent Contributions from Engineering, Science & IT (iJES), 4(2), pp. pp. 24–28. doi: 10.3991/ijes.v4i2.5905.