@article{EJDE_2005__2005__a194,
     author = {Li,  Wan-Tong and Zhuang,  Rong-Kun},
     title = {Interval oscillation criteria for second order forced nonlinear matrix differential equations},
     journal = {Electronic journal of differential equations},
     year = {2005},
     volume = {2005},
     zbl = {1075.34030},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2005__2005__a194/}
}