@article{10_21136_CMJ_1989_102297,
     author = {Ha\v{s}\v{c}\'ak, Alexander},
     title = {Tests for disconjugacy and strict disconjugacy of linear differential equations with delays},
     journal = {Czechoslovak Mathematical Journal},
     pages = {225--231},
     year = {1989},
     volume = {39},
     number = {2},
     doi = {10.21136/CMJ.1989.102297},
     mrnumber = {992129},
     zbl = {0703.34072},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1989.102297/}
}