@article{SF_1995__51_1_135410,
     author = {H. Zheng},
     title = {Strong {P-congruences} on {P-regular} semigroups.},
     journal = {Semigroup forum},
     pages = {217--224},
     publisher = {mathdoc},
     volume = {51},
     number = {1},
     year = {1995},
     zbl = {0834.20062},
     url = {http://geodesic.mathdoc.fr/item/SF_1995__51_1_135410/}
}