@article{10_1051_mmnp:2006001,
     author = {R. Dil\~ao and A. Lakmeche},
     title = {On the {Weak} {Solutions} of the {McKendrick} {Equation:} {Existence} of {Demography} {Cycles}},
     journal = {Mathematical modelling of natural phenomena},
     pages = {1--30},
     publisher = {mathdoc},
     volume = {1},
     number = {1},
     year = {2006},
     doi = {10.1051/mmnp:2006001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1051/mmnp:2006001/}
}