Yes, books can have Digital Object Identifiers (DOIs), which are unique alphanumeric codes assigned to digital publications to provide a permanent link to the content.
Yes, many books now have Digital Object Identifiers (DOIs), which are unique alphanumeric codes assigned to identify and provide a permanent link to a specific book or publication online.
je dois means i have
Dois menos um igual a dois - 2011 is rated/received certificates of: Portugal:M/6
Volume Dois was created in 1998.
The population of Dois Vizinhos is 34,001.
Dois Quartos was created in 2006-12.
"je dois" I have to leave = je dois m'en aller I have to work harder = je dois travailler plus dur
Que dois-je faire ? = What must I do ?
The area of Dois Vizinhos is 430 square kilometers.
je dois ... means I have to ..., I must ....
tu dois ... means 'you must / you have to ...' or 'you owe ...' when speaking about money.
je dois y aller, je dois m'en aller