@article{Sun2007Instability,
    author = {J. Sun and S. Chan and K. T. Ko and G. Chen and M. Zukerman},
    title = {Instability effects of two-way traffic in a {TCP}/{AQM} system},
    journal = {Computer Communications},
    volume = {30},
    number = {10},
    pages = {2172-2179},
    month = {Jul.},
    year = {2007},
    abstract = {Considering four popular Active Queue Management (AQM) schemes, we demonstrate by simulations that loss and delay of acknowledgement (ACK) packets, due to congestion, may significantly degrade the stability of a TCP/AQM system. We demonstrate that giving priorities to the ACK packets can stabilize the system.}
}