Original: As part of this research, Phelps published a famous paper "The Golden Rule of Capital Accumulation" (see Selected Publications) in 1961 on the golden rule savings rate, one of his major contributions to economic science.
Simplified: As part of this research, Phelps published in 1961 a famous paper "The Golden Rule of Capital Accumulation" (see Selected Publications) on the golden rule savings rate, one of his most important works for economic science.