@article{VMUMM_1987_1_a20,
     author = {A. E. Andreev},
     title = {On a method for obtaining more than quadratic effective lower bounds for the complexity of $\pi$-schemes},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {70--73},
     publisher = {mathdoc},
     number = {1},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1987_1_a20/}
}