text: from .wiener_process_reference_generator import WienerProcessReferenceGenerator
  from .switched_reference_generator import SwitchedReferenceGenerator
  from .zero_reference_generator import ZeroReferenceGenerator
  from .sinusoidal_reference_generator import SinusoidalReferenceGenerator
  from .step_reference_generator import StepReferenceGenerator
  from .triangle_reference_generator import TriangularReferenceGenerator
  from .sawtooth_reference_generator import SawtoothReferenceGenerator
  from .const_reference_generator import ConstReferenceGenerator
  from .multiple_reference_generator import MultipleReferenceGenerator
  from .subepisoded_reference_generator import SubepisodedReferenceGenerator
  from .laplace_process_reference_generator import LaplaceProcessReferenceGenerator
  from ..utils import register_class
  from ..core import ReferenceGenerator
  
  register_class(WienerProcessReferenceGenerator, ReferenceGenerator, 'WienerProcessReference')
  register_class(SwitchedReferenceGenerator, ReferenceGenerator, 'SwitchedReference')
  register_class(StepReferenceGenerator, ReferenceGenerator, 'StepReference')
  register_class(SinusoidalReferenceGenerator, ReferenceGenerator, 'SinusReference')
  register_class(TriangularReferenceGenerator, ReferenceGenerator, 'TriangleReference')
  register_class(SawtoothReferenceGenerator, ReferenceGenerator, 'SawtoothReference')
  register_class(ConstReferenceGenerator, ReferenceGenerator, 'ConstReference')
  register_class(MultipleReferenceGenerator, ReferenceGenerator, 'MultipleReference')
  register_class(SubepisodedReferenceGenerator, ReferenceGenerator, 'SubepisodedReference')
  