TY  - GEN
AU  - Moemen Helmy Aly Aburisha
AU  - Adib A.Fadlalla , 
AU  - M.Z.Abdalla , 
TI  - Qualitative theory of sturm - liouville equations / 
PY  - 1998///
CY  - Cairo : 
PB  - Moemen Helmy Aly Aburisha , 
N1  - Thesis (Ph.D.) - Cairo University - Faculty Of Science - Department Of Mathematics
UR  - http://172.23.153.220/th.pdf
ER  -