. . . . "PSR B1257+12 C" . "PSR B1257+12 d" . "17.28" . "Phobetor" . "PSR B1257+12 C" . . . "PSR B1257+12 C" . . "C (d / Phobetor)" . "Pulsar Timing" . . . . . . . . . "1992-01-22" .