中国科学院数学与系统科学研究院期刊网
TWO ENUMERATION THEOREMS IN SINGULAR ORTHOGONAL GEOMETRY OVER FINITE FIELD OF Ch.≠2 AND A CLASS OF PBIB DESIGNS
WEI HONGZENG
Acta Mathematicae Applicatae Sinica . 1994, (3): 347 -354 .  DOI: 10.12387/C1994035