41 3 v 1 2 1 N ov 2 00 1 ISO investigates the nature of extremely-red hard X-ray sources responsible for the X-ray background 1A. Franceschini,D. Fadda,C. J. Cesarsky,D. Elbaz,H. Flores,G. L. Granatosemanticscholar(2001)引用 0|浏览0AI 理解论文溯源树样例生成溯源树,研究论文发展脉络Chat Paper正在生成论文摘要