[1]孔宪正,陈俊璧,杨世活.ΔM与PCM兼用的数字电话模拟交换网[J].电子学报,1982(02):55-59.

Kong Xian-zheng, Chen Jun-bi, Yang Shi-huo. A Telephone Network Consisting of △M and PCM Hybrid Digital Carrier and Analog Switching[J]. Acta Electronica Sinica, 1982, (2): 55-59.

[1]孔宪正,陈俊璧,杨世活.ΔM与PCM兼用的数字电话模拟交换网[J].电子学报,1982(02):55-59. DOI：

Kong Xian-zheng, Chen Jun-bi, Yang Shi-huo. A Telephone Network Consisting of △M and PCM Hybrid Digital Carrier and Analog Switching[J]. Acta Electronica Sinica, 1982, (2): 55-59. DOI：