Cite
On Ha's version of set-valued Ekeland's variational principle.
MLA
Qiu, Jing. “On Ha’s Version of Set-Valued Ekeland’s Variational Principle.” Acta Mathematica Sinica, vol. 28, no. 4, Apr. 2012, pp. 717–26. EBSCOhost, https://doi.org/10.1007/s10114-011-0294-2.
APA
Qiu, J. (2012). On Ha’s version of set-valued Ekeland’s variational principle. Acta Mathematica Sinica, 28(4), 717–726. https://doi.org/10.1007/s10114-011-0294-2
Chicago
Qiu, Jing. 2012. “On Ha’s Version of Set-Valued Ekeland’s Variational Principle.” Acta Mathematica Sinica 28 (4): 717–26. doi:10.1007/s10114-011-0294-2.