@article{10_21136_MB_2011_141584,
     author = {Kalas, Josef and Rebenda, Josef},
     title = {Asymptotic behaviour of a two-dimensional differential system with a nonconstant delay under the conditions of instability},
     journal = {Mathematica Bohemica},
     pages = {215--224},
     publisher = {mathdoc},
     volume = {136},
     number = {2},
     year = {2011},
     doi = {10.21136/MB.2011.141584},
     mrnumber = {2856138},
     zbl = {1224.34252},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.2011.141584/}
}