PERSON@1 of the ORGANIZATION@1 said in NUMBER@1 , `` The theory of how pulsars emit their radiation is still in its infancy , even after nearly forty years of work .

PERSON@1 of the Max-Planck-Institut für extraterrestrische Physik recently said , `` The theory of how pulsars emit their radiation is still in its infancy , even after nearly forty years of work .
