Rodriguez Estrada, A. E. and D. J. Royse (2007). Yield, size and bacterial blotch resistance of Pleurotus eryngii grown on cottonseed hull/oak sawdust supplemented with manganese, copper and whole ground soybean. Bioresource Technol.98: 1898-1906. 이런 레퍼런스가 있는데 빨간색처럼 숫자는 어떤 의미인가요?