Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Name | Novelty | Status | Authors | Unit | Location |
| --- | --- | --- | --- | --- | --- |
| Austriadactylus | gen et sp nov | Valid | Dalla Vecchia, Wild, & Reitner | Seefelder Beds | Austria |
| Hatzegopteryx | gen et sp nov | Valid | Buffetaut, Grigorescu, & Csiki | Densuș-Ciula Formation | Romania |
| Jeholopterus | gen et sp nov | Valid | Wang & Zhou | Daohugou Beds | China |
| Piksi | gen et sp nov | Valid | Varricchio | Two Medicine Formation | United States |
| Pterorhynchus | gen et sp nov | Valid | Czerkas & Ji | Daohugou Beds | China |
| Thalassodromeus | gen et sp nov | Valid | Kellner & Campos | Santana Formation | Brazil |
| Utahdactylus | gen et sp nov | Valid | Czerkas & Mickelson | Morrison Formation , Utah | USA |
Question:
Which authors have a Unit of densuș-ciula formation?
Answer:
Buffetaut, Grigorescu, & Csiki