bibtype;author;title;journal;year;month;editor;publisher;booktitle;address;chapter;edition;note;pages;series;volume;institution;organization;school;type;doi; article;E. Castro-Ruiz, F. Giacomini, Č. Brukner;Entanglement of quantum clocks through gravity;PNAS;2017;0;;;;;;;;E2303-E2309;;;;;;;