共 10 条
[2]
AHMAD S, 1995, P 1 WORLD C NONL AN
[3]
AHMAD S, 1995, APPL ANAL, V57, P209
[7]
Gopalsamy K., 2013, Stability and Oscillations in Delay Differential Equations of Population Dynamics, V74
[10]
ZEEMAN ML, 1995, P AM MATH SOC, V123, P87