@article{于秀清:90, author = {于秀清}, title = {P-集合的(σ,τ)-扩展模型与其性质}, publisher = {《山东大学学报(理学版)》}, year = {2014}, journal = {《山东大学学报(理学版)》}, volume = {49}, number = {04}, eid = {90}, numpages = {4}, pages = {90}, keywords = {P-集合;P-集合副集的(σ,τ)-生成; P-集合的(σ,τ)-扩展}, url = {http://lxbwk.njournal.sdu.edu.cn/CN/abstract/article_21.shtml}, doi = {10.6040/j.issn.1671-9352.0.2013.610} }