TY  - JOUR
AU  - Todorova, Tatyana L.
TI  - Lagrange's four square theorem with almost-prime numbers having a special form
JO  - Mathematics and Education in Mathematics
PY  - 2021
SP  - 163
EP  - 175
VL  - 50
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MEM_2021_50_a17/
LA  - en
ID  - MEM_2021_50_a17
ER  -