@incollection{JEDP_1982____A7_0,
     author = {Charles Fefferman and D. H. Phong},
     title = {Lower bounds for {Schr\"odinger} equations},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {7},
     pages = {1--7},
     publisher = {\'Ecole polytechnique},
     year = {1982},
     zbl = {0492.35057},
     language = {en},
     url = {https://proceedings.centre-mersenne.org/item/JEDP_1982____A7_0/}
}