@article{Eckart_1936,
    doi = {10.1007/bf02288367},
    url = {https://doi.org/10.1007%2Fbf02288367},
    year = {1936},
    month = {sep},
    publisher = {Springer Science and Business Media {LLC}},
    volume = {1},
    number = {3},
    pages = {211--218},
    author = {Carl Eckart and Gale Young},
    title = {The approximation of one matrix by another of lower rank},
    journal = {Psychometrika}
}

@article{Eckart_1936, doi = {10.1007/bf02288367}, url = {https://doi.org/10.1007%2Fbf02288367}, year = {1936}, month = {sep}, publisher = {Springer Science and Business Media {LLC}}, volume = {1}, number = {3}, pages = {211--218}, author = {Carl Eckart and Gale Young}, title = {The approximation of one matrix by another of lower rank}, journal = {Psychometrika} }