中国科学院数学与系统科学研究院期刊网
CONSTRUCTION OF A CLASS OF MIXED-LEVEL ORTHOGONAL ARRAYS OF RUN SIZE $9n^2$ PANG Shanqi
Shan Qi PANG, San Yang LIU, Hai Feng YAN
Acta Mathematicae Applicatae Sinica . 2005, (2): 368 -378 .  DOI: 10.12387/C2005038