@article{10_1017_S0017089500007333,
     author = {Stochel, Jerzy Bart{\l}omiej},
     title = {Subnormality and generalized commutation relations},
     journal = {Glasgow mathematical journal},
     pages = {259--262},
     year = {1988},
     volume = {30},
     number = {3},
     doi = {10.1017/S0017089500007333},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500007333/}
}