@article{10_4153_CMB_1982_062_x,
     author = {London, David and Schwarz, Binyamin},
     title = {Strong and {Quasistrong} {Disconjugacy}},
     journal = {Canadian mathematical bulletin},
     pages = {435--440},
     year = {1982},
     volume = {25},
     number = {4},
     doi = {10.4153/CMB-1982-062-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1982-062-x/}
}