ABDALLAH, E. A. F., E. M. – Said, A. A. N. Ahmed, and E. E. K. A. – Kinawy,
"Analysis and Design of broad side and overlap microstrip line couplers by finite elements",
35th microstrip Symposium on Circuits and Systems, Washington DC, USA, 9 August , 1992.
Barssem, I. M., E. A. ABDALLAH, M. El-Said, E. A. Hashish, and H. Taher,
"Analysis of microstrip line on ferrite substrate using the method of lines",
XXVI th General assembly of the International union of Radio Science, Toronto, Canada, Abstract No. B4 .p.4, pp. 5, 1999.