@article{NUMA_1973__21_132207,
     author = {Alan Feldstein and Richard Goodman},
     title = {Numerical {Solution} of {Ordinary} and {Retarded} {Differential} {Equations} with {Discontinuous} {Derivatives.}},
     journal = {Numerische Mathematik},
     pages = {1--13},
     publisher = {mathdoc},
     volume = {21},
     year = {1973},
     zbl = {0266.65056},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1973__21_132207/}
}