@article{10_1017_S0017089504001971,
     author = {HEIKKIL\"A, S. and O'REGAN, D.},
     title = {ON {DISCONTINUOUS} {FUNCTIONAL} {VOLTERRA} {INTEGRAL} {EQUATIONS} {AND} {IMPULSIVE} {DIFFERENTIAL} {EQUATIONS} {IN} {ABSTRACT} {SPACES}},
     journal = {Glasgow mathematical journal},
     pages = {529--536},
     year = {2004},
     volume = {46},
     number = {3},
     doi = {10.1017/S0017089504001971},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089504001971/}
}