JP616, JP617, JP618, JP619, JP620, JP621, JP622, JP623, JP624, JP625, JP626, JP627, JP628, JP629
SP622, SP623, SP624, SP626, SP627, SP629, SP630
UP616, UP617, UP618, UP619, UP621, UP622, UP624, UP625, UP626, UP627, UP628, UP629, UP630
Romanian Mathematical Magazine