Matthias Ludwig. Immer wieder der 29. Februar. Wirtschaftsinformatik & Management, 2012(1):86, 2012. [doi]
@article{Ludwig12-2, title = {Immer wieder der 29. Februar}, author = {Matthias Ludwig}, year = {2012}, url = {http://www.springerprofessional.de/2847184.html}, researchr = {https://researchr.org/publication/Ludwig12-2}, cites = {0}, citedby = {0}, journal = {Wirtschaftsinformatik & Management}, volume = {2012}, number = {1}, pages = {86}, }