@conference {tanyolacc2011soft, title = {A Soft Landing Model and a Mass Spring Damper Based Control Heuristic}, booktitle = {The 29th International System Dynamics Conference, Washington, DC, USA}, year = {2011}, publisher = {System Dynamics Society (http://www.systemdynamics.org/conferences/2011/index.htm)}, organization = {System Dynamics Society (http://www.systemdynamics.org/conferences/2011/index.htm)}, author = {Tanyola{\c c}, Togay and Yasarcan, Hakan} }