@article{10_1017_S0017089509990218,
     author = {AGARWAL, RAVI P. and DOMOSHNITSKY, ALEXANDER},
     title = {ON {POSITIVITY} {OF} {SEVERAL} {COMPONENTS} {OF} {SOLUTION} {VECTOR} {FOR} {SYSTEMS} {OF} {LINEAR} {FUNCTIONAL} {DIFFERENTIAL} {EQUATIONS}},
     journal = {Glasgow mathematical journal},
     pages = {115--136},
     year = {2010},
     volume = {52},
     number = {1},
     doi = {10.1017/S0017089509990218},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089509990218/}
}