@article{RM_2018_73_1_a2,
     author = {E. M. Chirka},
     title = {Orthogonal complex structures in~$\mathbb{R}^4$},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {91--159},
     publisher = {mathdoc},
     volume = {73},
     number = {1},
     year = {2018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_2018_73_1_a2/}
}