The paper described for the first time how to grow the virus in the laboratory.

The male of the species P. specularis was described for the first time in 2003.

Thus he described for the first time the immunity principle.

He described some of these species for the first time.

Only described for the first time in 1999, ichthyologists are still expanding what is known about the species.

In a letter of February 1809, he described the image for the first time.

Such mechanisms have been described for the first time in recent years.

Most of these species were described for the first time.

Nonetheless, several tens of species were described for the first time during the 1990s.

In 1995 it was extensively described for the first time .