@article{202103.0590,
	doi = {10.20944/preprints202103.0590.v1},
	url = {https://doi.org/10.20944/preprints202103.0590.v1},
	year = 2021,
	month = {March},
	publisher = {Preprints},
	author = {Wei Li},
	title = {Half-a-century Burial of ρ, θ and φ in PDB},
	journal = {Preprints}
}