Fig. 1
From: A comprehensive analysis of the history of DFT based on the bibliometric method RPYS
Annual distribution of the references cited in DFT publications across their reference publication years within the time period 1800–1899. The major peak positions are at 1806, 1819, 1825, 1846, 1850, 1860, 1865, 1869, 1874, 1885, 1890, 1894, and 1898