. "gravitational microlensing" . "detected by microlensing" . . "Gravitational microlensing" . . "microlensing event" . "microlensing" . "Microlensing" . . . "microlensing techniques" . "microlensing exoplanet" . . . "Gravitational microlensing" . "microlensing observations" . "microlensing method" . . "microlensing events" .