Apex domains cannot have CNAME records.
Question and response
Question
dig softnet.mk. NS
Answer
softnet.mk. 5 NS buzz.softnet.si.
softnet.mk. 5 NS woody.softnet.si.
Authority
The response has no authority records.
Additional
buzz.softnet.si. 5 A 212.103.128.67
woody.softnet.si. 5 A 212.103.128.66
buzz.softnet.si. 5 AAAA 2a02:800:0:3:0:0:0:67
woody.softnet.si. 5 AAAA 2a02:800:0:3:0:0:0:66
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0