Apex domains cannot have CNAME records.
Question and response
Question
dig wolterskluwer.ro. NS
Answer
wolterskluwer.ro. 5 NS ns.luconsult.ro.
wolterskluwer.ro. 5 NS ns.wolterskluwer.ro.
Authority
The response has no authority records.
Additional
ns.luconsult.ro. 5 A 195.62.95.10
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0