@Article{zbMATH02128746,
Author = {Ricardo {Uribe-Vargas}},
Title = {{Four-vertex theorems, Sturm theory and Lagrangian singularities.}},
FJournal = {{Mathematical Physics, Analysis and Geometry}},
Journal = {{Math. Phys. Anal. Geom.}},
ISSN = {1385-0172; 1572-9656/e},
Volume = {7},
Number = {3},
Pages = {223--237},
Year = {2004},
Publisher = {Springer Netherlands, Dordrecht},
Language = {English},
MSC2010 = {51L15 53A04 53A07},
Zbl = {1068.51009}
}