@article{SM_2014_205_6_a2,
     author = {S. D. Glyzin and A. Yu. Kolesov and N. Kh. Rozov},
     title = {The theory of nonclassical relaxation oscillations in singularly perturbed delay systems},
     journal = {Sbornik. Mathematics},
     pages = {781--842},
     publisher = {mathdoc},
     volume = {205},
     number = {6},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2014_205_6_a2/}
}