@article{BASM_2018_1_a2,
     author = {Iryna Fryz},
     title = {Orthogonality and retract orthogonality of operations},
     journal = {Buletinul Academiei de \c{S}tiin\c{t}e a Republicii Moldova. Matematica},
     pages = {24--33},
     publisher = {mathdoc},
     number = {1},
     year = {2018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BASM_2018_1_a2/}
}