@article{AL_1998_37_2_a3,
     author = {V. K. Kharchenko},
     title = {An algebra of relatively primitive elements},
     journal = {Algebra i logika},
     pages = {181--223},
     publisher = {mathdoc},
     volume = {37},
     number = {2},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1998_37_2_a3/}
}