@article{MABA_2000_14_3-4_a3,
     author = {M. N. Kultur},
     title = {The {Formation} of a {Differential} {Equation} {Involving} the {Ratio} of the {\ensuremath{\Theta}-theta} {Functions}},
     journal = {Mathematica balkanica},
     pages = {227},
     publisher = {mathdoc},
     volume = {14},
     number = {3-4},
     year = {2000},
     url = {http://geodesic.mathdoc.fr/item/MABA_2000_14_3-4_a3/}
}