@article{GDZPPN002411822,
title = {A Limit-Point Criterion for Separated Dirac Operators and a Little Known Result on Riccati's Equation.},
journal = {Mathematische Zeitschrift},
volume = {129},
year = {1972},
pages = {75-82},
zbl = {0272.34035},
url = {http://dml.mathdoc.fr/item/GDZPPN002411822}
}
Kalf, Hubert. A Limit-Point Criterion for Separated Dirac Operators and a Little Known Result on Riccati's Equation.. Mathematische Zeitschrift, Tome 129 (1972) pp. 75-82. http://gdmltest.u-ga.fr/item/GDZPPN002411822/