Koushik Chakraborty
"Optimization of Gain of 4 -Element Array Microstrip Patches Antenna".
International Journal of Engineering Technology and Computer Research,
vol: 3,
No. 2
Jan. 1970, pp: 148 -152,
https://scholar9.com/publication-detail/optimization-of-gain-of-4-element-array-microstri-8199
