@inproceedingsGharibian_Santha_Sikora_Sundaram_Yirka_2018, place=Dagstuhl, Germany, series=Leibniz International Proceedings in Informatics (LIPIcs), title=Quantum Generalizations of the Polynomial Hierarchy with Applications to QMA(2), volume=117, DOI=10.4230/LIPIcs.MFCS.2018.58, booktitle=43rd International Symposium on Mathematical Foundations  of Computer Science (MFCS 2018), publisher=Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, author=Gharibian, Sevag and Santha, Miklos and Sikora, Jamie and Sundaram, Aarthi and Yirka, Justin, editor=Potapov, Igor and Spirakis, Paul and Worrell, James, year=2018, pages=58:1-58:16, collection=Leibniz International Proceedings in Informatics (LIPIcs) 
LibreCat: /record/8161
DOI: 10.4230/LIPIcs.MFCS.2018.58
arXiv: 1805.11139

@articleGharibian_Kempe_2014, title=Hardness of approximation for quantum problems, volume=14, number=5–6, journal=Quantum Information &; Computation, author=Gharibian, Sevag and Kempe, Julia, year=2014, pages=517–540 
LibreCat: /record/8171
arXiv: 1209.1055