[2] Encouraged by Titu Maiorescu and Simion Mehedinți, he continued his studies of geography in Berlin and, under Emmanuel de Martonne, in Paris.
[9] During the last year of his life, he removed the volumes of the library, scattered in the basement of the Romanian Athenaeum, and set it up on iron shelves in a reading room.
In 1926, he published "Coasta de Argint", which combined literary prose and scientific analysis in its examination of the Balcic area along the Black Sea coast in Southern Dobruja.
[11] Other articles included "Asupra trecerii Dunării prin Porțile de Fier" (1916) and "Văile, origina și evoluția lor" (1919).
These publications brought him international repute, and he was part of geographic study committees at congresses held in Paris, London, and Warsaw.
[12] His 1913 study, "România și popoarele balcanice", was used for a fresh work in 1918 by Orest Tafrali [ro] to press Romanian claims on Serbia.
A pair of conferences was published as "Carpații în România de azi" (1924) and "Influențele mediului fizic asupra capitalului biologic național" (1927), while "Basarabia" appeared in 1924.
During World War I, he was an adviser to the cabinet, sending weekly reports about the various areas inhabited by ethnic Romanians in preparation for claims to be made during the eventual peace conference.
[13] In the summer of 1935, he canceled a planned study trip to the Apuseni Mountains, instead heading to Dobruja to receive a large group of Polish tourists.