@article{SM_2005_196_2_a1,
     author = {A. A. Bobodzhanov and V. F. Safonov},
     title = {Singularly perturbed integro-differential systems with contrast structures},
     journal = {Sbornik. Mathematics},
     pages = {173--200},
     publisher = {mathdoc},
     volume = {196},
     number = {2},
     year = {2005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2005_196_2_a1/}
}