Geodesic
$tt$- and $m$-degrees
Algebra i logika, Tome 12 (1973) no. 2, pp. 143-161 
A. N. Degtev. $tt$- and $m$-degrees. Algebra i logika, Tome 12 (1973) no. 2, pp. 143-161. http://geodesic.mathdoc.fr/item/AL_1973_12_2_a1/
@article{AL_1973_12_2_a1,
     author = {A. N. Degtev},
     title = {$tt$- and $m$-degrees},
     journal = {Algebra i logika},
     pages = {143--161},
     year = {1973},
     volume = {12},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1973_12_2_a1/}
}
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IS  - 2
UR  - http://geodesic.mathdoc.fr/item/AL_1973_12_2_a1/
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